Yeah, my first thought too (well, I guess pretty much everyone's). This seems like "tmux, but less" since tmux is much more than a window manager, and tmux is absolutely not some esoteric software: even if you don't use tmux, you probably know, that if this is something you'd want, you'll install tmux. So, what's the point? Codebase being smaller? I absolutely don't care about the codebase of something I'm not writing myself.

tmux is literally the first program I install on a new setup, even before wget.