There's defintely a few old OG Xbox titles that I would've loved to go back and play but now can't.
I always hope for the real big online games that they can somehow create the world instance to work in an offline mode before shutting off servers. It seems a waste to not be able to play a beautiful game just because it needed online servers. Take Destiny 1. One day, they will turn off servers but I hope that they can leave everything updated as a patch, just essentially not allow players to join online with each other, unless its local hosting for PvP which could work. Probably not worth the hassle or money....