If you’re using Debian as a daily driver you can always use a Flatpak if you need a newer version than what’s available in the repos. The foundation is solid, though, and that’s what matters - it’s one of the things that keeps bringing me back to Debian for office workstation use.
Cosmic - both the GNOME extension and Epoch 1 - is my favorite tiling DE. It just makes the most sense to me, in a way that no other tiling environment has.