I switched from a Qtile tiling window manager to KDE with Krohnkite. It does the job of handling the windows. The auto tiling aspect is the only thing I miss in any regular window management. The reason why I switched to KDE back then was, a problem with Qtile and because KDE was good on the Wayland front. In fact, it was the only viable option in my opinion for a desktop environment. I was also using lot of KDE applications anyway, so it made sense.
Cons: you have to use KDE with Krohnkite
I don't see this as an con. Maybe you could argue that Krohnkite is not a core system functionality and we rely on some community member. BTW that was the biggest issue why I switched away from GNOME years ago, because too much core functionality was community dependent (and breaking). The KDE team themselves should integrate such a functionality. Auto tiling reaches was never more popular and KDE itself has some tiling functionality builtin, just not auto tiling.
Like Qtile had, I like we have many layouts to choose and cycle from. My 4th desktop is set to everything float; no tiling. I could not stand a auto tiler that has only one builtin layout logic.
But there are some couple problems using Krohnkite. It's not as configurable as I am used to with Qtile off course. And getting rid of the borders and having colored borders in KDE for focused applications and such, was a pain to setup. KDE really need some builtin functionality for that.