Have to admit, my first thought seeing the title was, "Really?! Do we need yet another tiling, or any desktop/wm?" but after seeing this one, I'm genuinely tempted to give it a try.... I've been running the COSMIC Alpha/Beta for about 6 months now and overall happy with it... but given my display and zoom level (45" 3440x1440 @ 125%) I'm mostly pinning a single app left/right anyway. This WM approach is pretty close to exactly what I want anyway.
I usually have VS Code, Terminal, Web Browser and maybe Email, Teams, Discord etc open depending on if it's work or personal. While I can't use this at work (Windows), I may give it a shot on my personal desktop.
I have one laptop where I use Niri along with COSMIC panel and COSMIC term. Niri is amazing.