Except GP said it works fine with all configurations with KDE, which is what most people should be using. I've been using Linux for 15+ years and have never heard of niri.
In fact there's a whole new cultural wave within open source - tiling Wayland compositors, shockingly featureful DEs based on QuickShell, brand new TUI tools with no CLI or GUI equivalents, and most of it written in Rust.
Most people should be running hundreds of megabytes of bloat?
KDE is unuseable on the brand new i3/8gb I run purchased last year.
I mean, the desktop renders, but god forbid I'd like to run more than three firefox tabs...