I’d say Red Dead Redemption 2 (RDR2). Everything about the atmosphere in that game was immersive - graphics were good enough that I didn’t notice they were graphics. I genuinely felt cold, wet, hot, windblown, or joyful at the various weather/environment situations in the game.
Interesting points, but you’re missing an important point: This isn’t necessarily about the definition of what SHOULD be or MUST be preserved, but whether studios should be allowed to PREVENT it from being preserved by those who want to.