I completely agree. I used to be a heavy xmonad user, but I've had to be on macOS for work the past few years. I've found emacs to be a suitable substitute for a tiling window manager for the majority of my use cases and then have macOS for the creature comforts part. I've been test driving KDE Plasma recently at home, and it's quite nice these days. I wouldn't call it fast compared to other linux desktop environments, but it's pretty snappy compared to the KDE I tried five years ago. It was pretty simple to get it looking and feeling similar to my mac environment, and then emacs is always emacs. I do wish there was a more modern feeling TWM, but for now I like having something family/friends/coworkers can comfortably navigate when the need arises.