For me, I really want to get into niri, but the lack of XWayland support scares me (I know there’s solutions, but I don’t understand them yet).
Also, I stopped using Emacs (even though I love its design and philosophy with my whole heart) because it’s very slow, even as a daemon.
Fourthing sway, specifically swayfx and (as someone already mentioned) autotiling, both of which are available in the Nix repository without hassle.