If you cared this much about "expert" opinions on making cross-gen games for old or weaker hardware, why did you ignore all of the other developer quotes from the other thread? I'll repost them for you:
Remedy, Control developer:
"Whenever you're in this cross-generational point, to be blunt, it sucks," Puha said. "You have to support the previous gen, make sure that sings, and then whatever you bring to next-gen is still limited by the choices you made years ago for the previous generation. It's not a very realistic thing, that this old game, we're just going to remake everything and then bring it to next-gen. It's just not like that. It's not a reality for us, because you're literally taking away resources that are building the future games and improving the engine for the future."
John Linneman from Digital Foundry spoke to several devs at the start of this gen:
“nobody wants to develop for an under-powered Jaguar CPU any longer.” “I’ve spoken with enough developers to know how painful the process is at this point,” he added. “Leave Xbox One and PS4 behind.”
Billy Khan of id Software lead Engine developer taking issue with the RAM choice of Xbox Series S, let alone PS4 RAM which is slower and less and not even factoring in the huge CPU deficit the PS4 has:
"The memory situation is a big issue on the S. The much lower amount of memory and the split memory banks with drastically slower speeds will be a major issue. Aggressively lowering the render resolutions will marginally help but will not completely counteract the deficiencies."
Axel Gneiting of id Software engine programmer:
"Also 'it always scaled on PC' is nonsense. Every AAA game in the past decade or so has their assets made once so they run on min spec. Increasing sample counts a bit here and there for high settings isn't what you could truly have done with more power. Min spec matters."
And you do realize the Horizon Forbidden West director is trying to sell a product that started development for the PS4, designed with PS4 limits, and was targeted to release before the covid delays right? He's not going to say "oh actually, our game is worse from not having been designed for higher-end hardware, but please still buy our game!"