Cinnamon 6.4 Desktop Environment Released with Revamped Theme, Night Light - 9to5Linux

I'm using cinnamon, but want to use the new plasma on a debian based distro. But nothing is supporting it out of the box just yet.

But yes, there are a lot

Someone enlighten me. How many active desktop projects are there currently? (Not just window managers...)

KDE Plasma, Trinity (is it active? Fork of KDE 3.5)

Gnome, Mate, Cinnamon (fork all the things!), or "reskins" like Unity or Budgie?

LXQt, Xfce... Is enlightenment still active as a project?

Does anyone use Deepin -- appears to be a partial fork of KDE (kwin, etc.) with new desktop environment built around it rather than use Plasma.

Or Pantheon (Vala+GTK3?).

Cosmic is from the ground up, recent and active I guess.

Missing anything?