I swapped to hax after the atuhor talked about it here on Hackernews, it really is very much a huge recommendation. Most importantly for me, it has been the only harness who respects the XDG specification and does not ask me to install by curling into sh. From my previous to harnesses, pi and maki, neither did both.
On top of that, it also feels very much like a normal CLI tool, which is a big plus for me.
It does not support plugins or MCP, which could both be a big negative for many people, but for now I was able to find a good terminal alternative for everything I needed.
Just a huge recommendation from my side as well, not affiliated in any way myself.