The rate PS4 was at in 2019 and before made me think 125-135 million were a given for it. Now, it's looking like 120-125 million. Sony seems to be starting to pull the plug as far as hardware support goes

And Switch had its best year in 2020 for hardware sales, and should have a stellar 2021. So in the likely situation Switch outsells PS4 (which I haven't thought was that possible until the PS5 launched), it will be in 2023 or 2024. Too tough for me to say.

I agree with most of the recent analysis. I am sure if this poll could be retaken today, over 80% of voters would say that the Switch will eventually outsell the PS4. If Sony were serious about pushing PS4 sales they should have cut the price by now. Once we get to January, the PS4 will probably be struggling to break 50k per week and will probably flat-line by the end of the 2021: the console has lost its momentum. If left without another price cut, the PS4 will not even make it to 120M units. The Switch, on the other hand, is already on track to easily sell 120M units and that is assuming no price-cut, pro-model or major new releases such as BotW2 that will generate massive hype. I also do not see Nintendo being as eager to pull the plug on the Switch as they were back in the Wii days. Nintendo understands the risk of releasing new platforms and after the Wii U I doubt that they are going to want to push out a totally new console until they have to. It is more likely that they will push out faster or lower cost revisions of the Switch like they did with the 3DS. Keep in mind that Nintendo has only a single platform now and so the risk is a lot bigger with quickly killing their console and releasing something totally new.  Also, we don't even have a codename for Nintendo's new console which usually comes 2-3 years before launch which tells me that Nintendo is nowhere near done with the Switch.  It will easily pass 120M and can probably even get to 150M when you consider that folks may want to re-buy the faster models.

That's gold, but this one specific part is always bothering me till this day " Most of the most iconic Nintendo gaming franchises have already launched in the console " why do these people keep pointing at this shit year after year still is a mystery to me. Did they think all of those titles will stop selling or something?

What do you think will be the lifetime totals for each system?

I'm sure it'd be the majority now but I'm not sure it'd be as high as over 80% yet since there's still a chunk of people who believe the Switch's sales are gonna start rapidly declining somehow. I wouldn't be surprised if it takes till 2022 for it to get that widely agreed upon.

I remember people saying this crap as far back as 2017, that "they've already used Mario, Zelda, Splatoon and Mario Kart, so their big guns are used up and it's only gonna go downhill from here."

Everyone arguing about Switch outselling PS4 at some point in the future...

Meanwhile at Nintendo:
Be ready for Xenoblade Chronicles 3, Xenoblade X DE, Monolith Soft's NewProject, Zelda BotW2, Metroid Prime Trilogy HD, Metroid Prime 4, Monster Hunter Rise, Pokemon 2022, Fire Emblem 2023, Earthbound/Mother Trilogy (Remaster), Mother 4, Golden Sun Switch, Mario Kart 9, New Mario 2022/2023, N64 &/or GB Online, New Donkey Kong Country, New Kirby's Core Game, New Wario Ware, Smash Ultimate Fighter Pass 3, Punch Out Switch, Pikmin 4, Kid Icarus Switch, Star Fox Switch, Racing Excite Game, Splatoon 3, Bayonetta 3, Pokemon Snap Switch, New Mario Strikers, Super Mario Party 2, F-Zero Switch, Third party Games, Mario RPG 2...

When this thread was made Sony still had the possibility to make it never happen and allow PS4 to outsell NS lifetime.
But now NS took off at ludicrous speed and at the same time Sony hasn't made yet the price cut PS4 really needed to keep on selling enough, so sales plummeted.
Sony could cut price now, but at this point most probably it could just delay the moment NS will outsell PS4. Unless Ninty stop making it too early, NS should reach PS4 not later than 2024.

At the current point of time we still don't know the sales potential or longevity of Switch, yet it's not crazy to think it could get within reach, if not outright match the highest selling systems ever. We can't even say without some reasonable doubt that 2020 will be it's peak sales year.

Are you implying the same sales potential was feasible for PS4 if Sony wanted it, even though it's currently falling further behind the Switch launch-aligned? Even though the Switch is still yet to have a single price cut?

At the beginning of last year current NS yearly peak was unthinkable, although already predicted to be very high, while at the same time PS4 sales hadn't plummeted yet, and on top of this Sony is well known to give Playstations extremely long lifecycles, quite longer than most Ninty ones, except Super NES (and NES in Japan), with many years of sales also after next gen launch, so keeping the lead was still possible even never reaching NS yearly peak. Now not anymore, even if it will be supported for another 3 or even 4 years, Sony just burnt the last possible big Xmas sales keeping a price that doesn't make sense anymore for last gen consoles place in the market after latest gen launch, and definitively put PS4 in a marginal sunset boulevard. Even if a dramatic price cut were to give PS4 a bigger Xmas 2021 than 2020 underwhelming one, it won't be enough to make up for it, the gaussian-like descending sales curve will remain the same, but with the BF & Xmas 2020 part chopped below the same period of 2021.