Thanks for all the replies.

When comparing the 2013 PS3+X360 black friday VS 2020 PS4+XB1 we can clearly see that it was a mistake for both Sony and Microsft to not have better deals and to not lower the prices of their old consoles.

When it comes to the Switch, I believe it had (and still has) enough stock in Europe and Japan so I don't know why so many of you seem to think that was not the case? Don't know about in North America though.

Sony did say they wanted to transition people from PS4 to PS5 faster than prior generations and it seems they meant it in that they're deliberately not pushing PS4 with aggressive pricing or an abundance of stock now that PS5 is out. The Pro in particular is still $400 and that's not a good deal any more now that you can get a PS5 digital version for the same price.

Xbone was never that popular to begin with so with increased competition it's no wonder its already limited appeal has collapsed.

launch aligned its only 1 mil behind the wii RN

Iwata=Cthulhu confirmed, the stars are right and he'll rise again from R'lyeh bringing madness and destruction.   

Can you provide any sources for that?

Lmao define "mistake"? There´s clearly no stock to be allocated, Sony wants to sell Ps5s now AFAP not Ps4, that´s why price on Ps4s is still high AF, Pro is the same price as Ps5.

What a joke post, "mistake" hahaha you understand 0 about making business, let alone understanding as well as a Company that can Sell an average of 100M Consoles each Generation. 

The "mistake" will keep happening until the Storm settles & Sony shows what they will do with Ps4 but i can see Pro being eliminated completely.

Ps5 - 499.99e
Ps5D - 399.99e
Ps4s (?) - 199.99e Bundled.

Comparing sales/pricing is not sufficient to justify whether a strategy is a "mistake" or not, since that depends on goals of strategy.
Fair to say you assume "selling the most consoles now" (irrespective of generation) is Sony's goal, but IMHO that's isn't 100% true.
And just because they follow one strategy at one time doesn't not mean that is the one and only strategy for all time & situations.

First of all, console sale themselves are not profitable for Sony, it is all about subsequent software sales & services.
What does selling additional PS4 do now for Sony? They are planning for their 1st party offerings to transition to PS5 within 2-3 years
(and some are already doing so) so a PS4 sold today will not be able to profit from  their ongoing game investments in PS5 games.

Lowering the price of PS4 with a Slim2 that could sell more at lower price would also imply contracting larger production capacity.
But why do that for limited viability product when the same production capacity could build MORE PS5 which are supply limited?
It's just not that enticing to launch new SKU with new unique parts chain, when that market is basically certain to decline further.
Also related is question why retail outlets should dedicate shelf space to this when that could be more profitable with PS5 units.

This isn't to say there is no plausible reasons Sony might see to refresh PS4 with a price drop, just they aren't automatic.
Refreshing BOTH base PS4 and Pro seem excessive for marginal market like this, probably only one of them would be retained.
I could even see a niche for "all digital" Pro Slim essentially directly aimed against Series S, but "potentially" =/= "mandatory".
So it's a huge stretch to claim it was a "mistake" for both Sony and MS to not further discount lastgen platforms (likely with Slim2).
MS itself is targetting much of the same market with Series S, especially considering how they will likely further discount Series S
(with future "S Slim" etc) and Sony themselves also are creating opportunity with all digital model that also can target lower price.

I believe we have similar perspective on the topic at hand, although I don't think the disrespective tone of your post ("Lmao", "what a joke" "hahaha") serves any purpose other than self gratification which TBH does not reflect well on yourself, whatever that counts for in semi-anonymous internet. I mean, the fact you are even proposing new "refreshed" PS4 Slim2 lineup shows you don't consider the concept to have ZERO merit, even if Kjartan's post was made with perhaps too concrete of assumptions (perhaps not most insightful, but certainly not disrespectful or trolling). Keep it classy.

I believe the nature of newer processor nodes means a simple "shrink" of existing design (PS4 Jaguar) isn't possible, and costs of "redesign" for new process aren't viable, so going disc-less or "all digital" is probably the only major price reducer available (actual cost reduction less relevant than it's better "capture" of direct digital game sales VS retail discs). That may even address problem of long-tail lastgen sales, when retailers would tend to reduce their inventory of new lastgen games... But I'm not sure that's enough to really justify the project for Sony.

Accelerating the adoption curve for PS5 just seems by far the most rewarding thing for Sony to devote themselves to, and if that "works" it may even lead to shorter generations. That is why comparing to sales/price-drops at last gen transition isn't really as determinant as Kjartan believed... They don't want to replicate lastgen adoption curves (PS3 specifically having even slower curve), they want much faster and therefore more profitable approach... With their 1st party games being even larger focus of profits these days, they need their audience to be aligned with that 1st party game output, not buying dregs of 3rd party lastgen offerings which have low margin for Sony (even digitally). That isn't to say they can't continue selling PS4 for now if it's immediately profitable, but putting new effort into new SKU is very different thing... Rather than a refresh PS4 SKU, I think we might see faster move to refresh/"Slim" PS5 SKUs, with new processes already maturing for that.

No need to be so aggressive and condescending. Obviously Sony want people to buy their new product which is the case but the fact is they don't have enough stock at all and we don't know yet when that will be the case.

With the Switch being the hot product that is it, it's IN MY OPINION a mistake to not lower the price of the PS4. It worked wonders for them when they did it with the PS3 and the PS2 so why not doing it this time ? With the PS5 being so expensive, their old console ia good alternative for people who can't affort it and are interested in gaming.

That's just my own personal experience  but I have many friends who bought a Switch or Switch lite because it's cheap and hat great bundles (with a good line-up of games but so does the PS4). Lately I haven't seen many bundles from the PS4 (especially in Japan).

Sony wants as many people in their ecosystem as possible. Someone buying a PS4 for the first time right now doesn't mean they won't purchase a PS5 later in 4-5 years or less.

Go to the websites of any retailer in Europe or Japan, the Switch is wildely available.