Can't figure out or don't think it's worth the investment? They have a streaming service for that and I'm sorry but as much as MS likes to talk about BC it's still not a feature the majority of gamers use often. I know they like to trot out "this many hours of old games have been played" well yeah when you aren't releasing enough new content that tends to happen. You know not every 360 game works on xbox series consoles right? hell hardly any original xbox games do yet you want Sony to include PS1/PS2/PS3 games or it's embarrassing?
I haven't played a single "next gen" game on my XSX yet, all the ones I want to play I already have on my PS5. I have been playing Jurassic Park and gave Halo MCC a try the other day because it was recommended here, still looks like an old game running at a better resolution than it did at launch but the stuff is still ugly by today's standards, hell even by last gen standards. I probably won't be playing anything "next gen" until the fall from the looks of it, that's on me for buying a machine when I knew the short comings but BC matters most when a generation first switches after that it should matter less over time.