Sony would absolutely come after Microsoft if there was any breach of contract. You’ve seen this whole way sony has reacted throughout this when they pay a ton of companies to keep games ps5 exclusives and/or timed released and/or timed content releases.
There is also a difference where by the time ps6 is in protype phase and for games to be tested on it the new Xbox would be also. There is no way after years of development on a console that Microsoft would re architecture their console because of something they saw on ps6
I think I’m lucky with not really running into bugs with my P8 so far