No issues per se, but academic publishing has deep roots in the latex ecosystem. So templates from publishers are often not available in typst, or the publisher insists on a latex formatted file.

Often supervisors/professors etc will also resist using typst because of the cognitive overhead on their already oversubscribed time. Typst has about 40 years of history to overcome and that will take a long time to do.

Everything you say is true, although Typst is making slow headway¹.

Also, it’s possible, using some Pandoc magic², to enjoy aspects of Typst markup while generating a LaTeX document.

1 https://lwn.net/Articles/1037577/

2 https://lee-phillips.org/typstfilters/