I've been looking into it. It's `blazingly fast` (aside from the rust joke, it really is way faster than latex), the syntax is more "modern", consistent, etc. The main problem is the popularity. It just does not have enough packages, at least for my use case. I mainly do a lot of equations (simple math), and a loooot of tikz (forest, circuitikz, pgfplots, etc.) [ https://gitlab.com/vslavkin/escuela/-/tree/main/5to?re…
Can't comment on the AucTeX part, I'm using helix and typst support is not great but good enough.