If the games are playable on the oldest PS4 why would you need to upgrade?

There are plenty of PC gamers with hardware older than 5 years. Apparently there isn't a mystical force to force them to upgrade.

There is a problem with upgrading an existing console every 5 or so years.
Right now,you have a base ps4 and neo which is just a better and upgraded ps4 base model.It's based on the same arhitecture as the base model.
If they keep upgrading the ps4 every so often there will come a time for a change in the arhitecture,right?
You can't upgrade the existing shit incrementally forever.
And when the time comes calling for a different arhitecture what then?Are you gonna force the devs to develop games for the base,neo,neo2,neo3 etc?
Correct me if I'm wrong.

Well. you are right and wrong at the same time. 

First off we are talking X86 32/64bit architecture here. Which was introduced since the 80s or even the 70s if you wanna go as far back as x86-16bit. I strongly doubt that there is going to be a massive tech change in the next 20yrs that validates a shift from X86.

Secondly, but you are right that there will come a time when the upgraded version is so far ahead that certain skus have to get culled. but if you look at my above chart or whatever, you will see I factored that possibility in but even at that each SKU gets around 15yts of support. 

Lastly, there is a reason why console games  are made using SDKs  that are provided by the platform holder. And there are benefits that comes with that too. I'll put it this way, if Sony has up to the neo3 out there, which using a 3yr release scheduke would mean the current PS4 will be in its 18th year and by that time "official" support for it would have been dropped. When updates are released, it will no longer get them "officially". 

Anyways, when sony releases the Neo3 SDK, it's not like all of a sudden that dev is now working with like 4 skus for four different skus.... that's like suggesting that when a dev is making a PC game they code for every single GPU in the planet seperately. No, there is a reason u have things like direct x, PS shader language, open CL.....etc. Sony builds in support for the previous consoles into the new SDK. and devs have to code for just one thing and check a couple of boxes to ensure support for previous models. 

It'll be hard for publishers/developers to support a platform every 3 years.

PS5 will be out in 3-4 years after PS4 Neo. Then PS5 Neo a few years after that. So on and so fourth..

Quite honestly... this is the gaming industry, not the technology industry. I know Sony has lost sight of that, but there is a reason why the last generation lasted that long. We DON'T need the latest technology constantly.

As much as Sony wants, i don't think what they are aiming to do will work with the market. It will be too confusing for the average consumer and the hardcore consumer will feel gouged.

So... i think they are trying to hand the market back to Microsoft and Nintendo. You can either buy a system that is outdated and whose games don't run so well after 3 years... or you can buy an xbox or nintendo console whose games are optimised for it for 5 or more years.
Consumers aren't stupid. I am pretty sure that Japan and europe won't accept this. US is easier to fool, but even so... its MS home turf.

Also, this doesn't make it easy for developers and publishers at all. They will have to develop and bug test multiple versions of their software.  Also, if it runs crap in say the regular PS4, word will come out and their game's audience is actually shrunk to only PS4K userbase. This is bad in all fronts.

This will probably work for Microsoft and the Xbox brand because of Windows and Direct X, but Sony at some point is going to only support the base PS4 model for so long as it will hold the more high spec systems back eventually. Also the Windows OS was built for scale and to allow the software to take advantage of different hardware, but games made for the PS4 are either ported to the PS4k and given extra features or developed side by side as a separate project.

Stop treating rumors like they're fact.

Under your model, shouldn't the Neo 2 would be introduced at year 6, not year 9, wouldn't it? Why release a new PS4 3 years in and not another one in another 3 years? Why suddenly go back to regular release model after that?

Also, you think developers are going to support three different PS4 skus at once, and 15 years after its release developers will still be supporting the base PS4? Are you out of your mind? That would be like Sony mandating that all new games still support the PS2! Under your model games would be held back even further by older hardware than they are now.

Brilliant. I apologize for giving you too much credit in my first post.

You're idea is completely non-sensical and there is a 0% chance this ever happens.

Nope. This isn't just the case. And I don't know how many times I could day it before it sinks in. Developers aren't supporting 2/3/4 different systems. They are supporting One system with 3-4 different settings. It's up to Sony to make that process smoother. Developers are working with ONE SDK. 

The reason the last generation lasted so long is exactly what makes this necessary. There is just too much time between technological jumps now. And there is no confusion here. You aren't walking into a store as a consumer and wondering which PS4 game to buy. You still just buy a game and toss it in. 

And this developers and publishers argument. That just tells me you didn't read my OP or he article I linked whch was in fact made by a developer. But I'll say this. APIs. 

Its pretty much now a fact that a more powerful PS4 is making its way to devs. and devs have spole about it. Devs kits are even with them. How is this still a sumor to you. Or is this the whole burying ones head in the sand thing?

I made a slight mistake with my year timing. It was all off cuff so yh.....

You can call my idea nonsensical. Technically it's not even my idea. But the fact is this, it's already happenning. So we'll see. 

I'll say again. developers aren't supporting different skus. they are supporting One SKU that just happens to have settings for low, medium, high and ultra settings. Like you know, what's been done in the PC space for like.... forever.