snapshots would be nice. it is actually a container of sorts underneath, with RDP support, so they could do it if they desired. (they don't, it seems, unfortunately.)
Windows containers gaining RDP is probably the bigger wishlist item, for me. Windows containers with a GUI would make some things extremely trivial and other things much easier.
I documented how to set up RDS in containers back in 2018 [1] then Microsoft swooped in and killed it. They are weirdly sensitive when it comes to terminal services. Could perhaps be licensing/financially motivated. I get emails almost weekly to this day asking for updates. Wish I had one.