You probably know this already, but you can use KDE with your choice of WM, allowing you to swap out kwin for i3/sway or whatever else floats your boat/gives you tiling.

Edit: Spelling

Only on X11 though, and you can only use X11 window managers.

Ah, thanks for the correction. Do you happen to know if this is on KDE's roadmap for Wayland?

Edit: A little bit of internet later, I found these:

    https://drewdevault.com/2018/04/28/KDE-Sprint-retrospective.html
    https://userbase.kde.org/Tutorials/Using_Other_Window_Managers_with_Plasma#cite_note-1

It looks like it will probably be done at some point, and is definitely possible.

Thanks, I actually had a vague memory of having read about this somewhere. Cool!

I tried that but ran into weird app behaviour and gave up at some point. Might give it another try at some point

Some apps do behave badly with strictly tiling managers in my experience. Usually what I do is make one floating workspace and open them in there.

I can recommend krohnkite which can be found under Kwin scripts -> install additional. Can also be extended via js