Is this something that other gamers take into consideration when buying games?
I do take BC support into consideration, even thought sometimes I decide against buying third party games on Xbox. If I want to play with a friend only owning a Switch/PS4.
The best part about owning all consoles, beside being able to play all these great exclusive games is the fact that I am free to decide which version to get and every plattform has their benefits. Switch is great, because it's portable and I dunno why, but I prefer to play some games portable like World of FF.
Having said that, Xbox is nowadays my preferred plattform for third party games, because One X delivers the best performance usually and for games like RDR2 the achievement progress tracker is really good. I hope PS5 will have this feature. And obviously Xbox BC approach which goes above and beyond the expected BC solution, which PS5 has.
That's great and I am looking forward to play Spiderman, The Last of Us, ... again. However the BC team is one of the reasons I decide to buy my games on Xbox mostly after playing the majority of time on PS this gen. So yes BC and what enhancements are made with the BC solution are under consideration when choosing the plattform I buy games on.