It's also been a very long time since there's been an enhanced game.It was specified that not all of them would be available to do it with. It did depend on some factors, but unsure of what.
Think his name is Ryan from ign, noticed that many of the (was on) backcompat team was in the xcloud video. Which easily leads people to wonder if that's taken a hit on the bc enhanced games.
BC is pretty big for Ms, enhanced was a huge cherry on cake.
They've been pretty quiet about it, hopefully xo18 they will have good news. Once again, not holding breath though.