The only example I can think of is Nintendo Online. You can play select NES and SNES games on the Switch with a N.O. subscription.
I collect ROMs, I've got damned near 4Tb worth. I collect for two reasons:
1. Archiving 2. Most of the "good" vintage games carry ridiculous prices. Games that had over 10 million copies pressed going for $100+. Even if we assume 1 million were destroyed, that's still 9 million copies floating about. Not exactly rare or worth $100.