I used whatever the default Ubuntu DM is (gnome, not sure the version) for a while, because I got a new computer and didn't feel like messing around with .config stuff. Tuned it a little -- actually the gnome tweaks and plugins system is pretty nice! I had an applet that could control my smart-bulbs, and there's one that will invert a window color (I'm sure this is possible in sway but it would probably involve come obscure program I might need to compile).

But in the end the draw of proper keyboard controls over my WM is too appealing, switched back to sway.

IIRC, one thing that kind of kept me on the floating WM was Zoom. I think the general Zoom workflow depends on drawing a lot of windows of various random sizes, closing and opening them automatically, etc etc. It is a pretty dumb application (but it was mandated from on high, so...).