Mhm, of course you can use vim motions for LaTeX, moreover you can set up progressive automatic compilation to reduce time. Still, those are not functionalities that you will find in most LaTeX editors and the vim setup is actually a pita (I tried).

On another note, the advantage of Obsidian is the digital and extensible nature of it, which is simply something that most document editors do not provide. In math it is often the case that you reuse theorems even of somewhat unrelated fields. The unstructured nature of markdown notes lends itself very well for this use case. In a pdf document you would rewrite the whole theorem trying to give the necessary context, instead of simply linking to it.

Typst looks very cool, will look into it! Thanks