One retro game that I think hasn’t really been well-imitated since is called The Last Express. You’re on the last major express train through Europe before World War I.
What sets it apart is both a very vivid art style using rotoscoping of live actors, as well as a real-time gameplay system wherein the NPCs of the train can constantly move around, scoot past you in the car hallways, or even seek you out during certain key events.
This is exactly my worry.
Suppose that on some level, this was possible. You wouldn’t see nice, cozy instances of people who’ve finished their old collection selling them to low-income folks that just got their first Steam Deck. You’d put some games on sale for $10, and an automated Python script would automatically buy them and put them back up for sale for $49.98, one cent less than the new copies being sold.
When literally every single digital copy of a game is “equivalent”, the used games market just doesn’t make sense - although there’s a hundred third-party sites that would like it to work that way so they can take their un-earned cut.