It's basically i3 where you can mostly just drop in the config, but it works on top of wayland instead.

In addition to the other post: In order to be someone who would use this project, you have to be a very specific niche of tech.

Linux user, not Nvidia GPU, interested in custom tiling window managers (i3) AND next generation display protocols (Wayland).

I use this on my Thinkpad T510 but can't even run it on my desktop because of (Nvidia's) hardware incompatibilities.

Other than what the other commenters wrote, there is also a lower level library called wlroots which is used by basically every “niche” wayland server. So if you are not plasma or gnome and want to write a wayland compositor you will more than likely just depend on this library as well.