Some of us still do. Namely myself, Bukkaz, NorwayDude, Koolaid, Slime, StreetWarrior7, MiNd occasionally and maybe a few others. However we don't play every day of the week nor do we play many hours at a time either so empty touge lobbies are frequent unfortunately.
If you DO wanna upgrade to the XB1 for FM5 I know many people who can talk you out of it. It would be best to wait and see what FM6 has in store.