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