My main reason is one you listed. My setup works well for me; I enjoy it; and I don’t feel the need to fix what ain’t broke (when the “fix” likely involves breaking a lot of things I need to fix, and generally a lot of time and effort). Plus, from what I can tell, if you are particular about parts of your system, the immutable distros on offer are not diverse enough to cater to you—eg can I use my preferred init system, runit? All the immutable distros I know are systemd (which I am not a big hater of, but I like and am accustomed to runit already).

Edit: saw what you said at the end about what it would take for me to switch. It would be if I had a real use case for it, eg I regularly had problems that an immutable distro would solve, or I could see a way that an immutable distro would drastically improve my workflow.

Waybar/polybar or one of the scriptable widget systems.

Artix as my daily driver because of the AUR, and I like runit. I no longer feel the need to distro hop; I’m happy here.