The profits of PS4 show that simplicity is king. They went for custom power and some mind blowing new tech with PS3 and all it did was cause everyone headaches who tried to develop for it and cost them gazillions of dollars. They went simple with PS4 and everyone was happier. Hell the PS3 uniqueness is costing them to this day with BC not being available (not as much as some would claim but I imagine some have not bitten because of it). Hopefully they can overcome it with this new tech they patented for BC on PS5
Yep. I'm glad they are sticking to this strategy from now on, too. While custom HW worked for the PS1 and PS2, they shot too high with the PS3. It was inevitable, I suppose. When you make your own custom chipset it just adds so much to the R&D cost, as well as manufacturing costs, since foundries have to be equipped to make those special chips. Which is crazy when you think about the goal of the PS3, to just plays games well. Now, HW is much cheaper to make and you become profitable on HW much quicker. I believe it took them about a year to start making a profit on HW, where the PS3 took 3 or more.
I'm hoping that PS5 is B/C with all 4 systems. PS4 if obvious, since it is an easy way to transition PS4 owners to PS5. PS1 and PS2 needs to be, as well, since there are so many Classics on the store that will just be sitting there for no reason, as people will have nothing to play them on. Sony has already made a great PS2 emulator for PS4, so I'm guessing it will be even better on PS5. They already had a great PS1 emulator in the PS3, as well. I wouldn't think it would take too much work to get it running on the PS5. PS3 is obviously the most difficult, because of the complexities of the Cell CPU. But, Ryzen is supposed to be a beast, so I would imagine it could handle it.
Personally, I'm looking forward to what their patent seems to point to, remasters via emulation. Higher res textures and, hopefully, higher poly models for PS1 and PS2 games would be incredible. If you could buy a hi-res pack for them, maybe $2.99 for PS1 and $4.99 for PS2, I would buy them. I'm sure only a few games would use it at first, but if Sony can show that it would be a good revenue stream for devs/pubs, I wouldn't be surprised to see them put a 2-5 man team on "remastering" these games. Though, really, if Sony's emulator does just what the PS2 emulator on PS4 one does for both systems, rendering at 1080p (maybe 4K this time) and AA for jaggies, I'd be happy.