I'm a console video game developer. I've made PS4 games. I have used the PS4's development tools. Please tell why you think it will work this way when I have actually developed multi-platform PS4 and Xbox One games and likely have a far better idea of how this will actually work in practice. I assure you that there will be more work doing what most people call "porting" than simply changing the settings of the compiler and calling it a day. Modifications will have to be made to ensure both games run optimally on both versions of the console. Both versions will have to be tested equally and seperately, effectively doubling QA work. It's not a matter of just changing some configurations - if it was porting games from one platform to any other platform with similar specs would be a joke. I do not care how it works on PC, console video game development is fundamentally different, and it isn't changing overnight just because Sony introduced a higher spec console.
Thank you! People seem to think it's magic lmao! Even direct ports require extra work to compile.