The point is I don’t need any wm for this workflow. It just works on any box regardless of OS.

Seconding Niri, it's easier to configure compared to other Tiling WMs and has good out of the box defaults.

Though you'll have to fiddle a bit with stuff like waybar, fuzzel and xwayland-satellite. But once you've configured that stuff you won't have to fiddle with it non-stop.

I'm currently running it on Fedora, to be clear.

There’s a second monitor for those times when it’s an unquestionable benefit. Most of the time having multiple windows open is inefficient use of screen real estate (I either have two or three panes in the IDE - the terminal is also here, a browser with console open, some db query tool with wide tables or corp chat, which I explicitly do not want to see when I’m working on anything of substance.)