RE Engine: Monster Hunter, REMakes, DMC. All run beautifully
Idtech: Doom 2016 and Doom Eternal are super optimised on low end hardware
Then you have Unreal Engine 5 which needs top end hardware to run (Remnant 2, Lords of Fallen) and
Gamebryo/Creation which still has bugs from Morrowind in Starfield.
Not sure if related but City Skylines 2 needs several times $$ investment for slight improvements over Cities 1 on Unity
Now a splash screen either makes me smile or cringe. Just wished everything ran RE engine
See. It's easier to use but of an axe to hammer the nails rather than to use the handle of saw to hammer the nails. Both have advantages and disadvantages.