Yes, of course it is not perfect and has limitations, but as you say, for the majority of purposes, I find it is a much easier tool to use.

I've mostly used TeXmacs to quickly draft documents without having to deal with setting up a TeX environment. Once I am happy with my drafts, I write these up in LaTeX.

Hopefully, in time TeXmacs will be more universally accepted that a post-writeup in LaTeX will not be necessary.