- Pros:
- system trays applet already works out of the box (still customizable to some extend at least more than gnome system trays)
- very good support for Wayland and VIDIA GPUs
- easy and quick to customize and you don’t have to deal with CSS if you don’t have much time to waste
- better integrated with KDE’s softwares (Kdenlive, KDE connect, Konsole, Kate, Elisa…) which is my opinion some of the best softwares for Linux even better than Windows’s in some cases
- friendly community (mostly)
- Cons:
- you have to use KDE with Krohnkite


I think Cosmic will be the best compromise once it finally releases. Having the ability to swap between tiling and floating quickly and per workspace gives you the best of both worlds.
Krohnkite can do that too. You can float individual window on they fly with a keybinding, or switch the entire virtual desktop to float all layout. I even have setup my 4th desktop to always float. So this ability is available in KDE with Krohnkite already.