Sony are planning on releasing exclusives on day 1 for the PS5 only that are coded with PS5 tech like the SSD in mind for example, they just won't run on the PS4... Sony want people who own a PS4 to transition to the PS5 as quickly as possible... Microsoft on the other hand are happy to just cross platform for the first year and a half.
Look at Godfall for example, that's a PS5 exclusive and PC... No PS4 version

Yes devs will still create games for the PS4 but Sony's first party devs will be focusing on the PS5 exclusivity.
If its bollocks I'll eat my words... Just as I'll eat my words if the PS5 isn't a 9tf or lower machine
Lol wat? Godfall is a 3rd-party game, and a running meme is that it looks like a PS4 game with higher IQ and RT enabled (not saying that's
my personal opinion on it (I think it looks pretty good visually), but it is an opinion a lot of people who've seen footage think).
We can assume Sony will have some exclusives at launch, the question is which ones have actually been
announced? Zero so far, that's the problem. And there are multiple ways to transition people from an older platform to the newer one: considering 3rd-party AAA games are usually the biggest draws to either Sony or MS consoles, that transition can be met through other things such as an attractive price point, or new services tied to the new console, etc. It doesn't
solely mean exclusive games.
You are also misunderstanding how AAA game development is these days. Both systems will have SSDs with at least some giant chunk of NAND (be it 3D NAND, PCM, or a mix of both) memory-mapped to virtual RAM cache (the NAND; PCM Xpoint-style memory would act more like an actual persistent RAM, but I'm only entertaining this because someone else linked something the other day about
Micron's X100 SSDs which looks intriguing) , and both will make it very easy for devs to take advantage of this. Game engines are designed to be scaled not just with graphics but also game logic, AI, physics systems etc.
Therefore it's magnitudes easier than in the past to develop for the upper end and then scale down. There will even be instances of last-gen games getting ports by completely different dev teams, that happened with some 360 and PS3 versions of early-gen XBO and PS4 games.
No, he said above 10.7 (hence the >), but that was referring to Stadia, which is GCN.
So when you take that comparison and reference into context, "even" a 7TF Navi GPU would have equal to better performance than that. So practically everything we've seen and/or heard from both systems pushes them well past Stadia.