Normally I'd say I would be exactly the type of person that would use such a thing. But what scares me away and makes me stay with vanilla KDE Plasma is that perceived upfront cost of having to relearn everything and having to customize for hours to then have something that feels 100% better in some and 100% worse in other situations.
Maybe that just means I am currently at a point in my life where I haven't got the time or energy to play around with these things. I'd rather have KDE Plasma with a hint of tiling window manager than a tiling window manager with a hint of Plasma, if you get what I mean.