I tried typst a year ago, and I found it really nice to use compared to Latex. I even managed to make (or modify I don't remember) a small module to customize boxes, something I would not have even though of trying with latex.

I don't use latex anymore and I don't have a use case for typst, so I'm not currently using it, but I follow the advancements from time to time, and I have to disagree with the advisor.

Typst is perfectly fine for replacing latex in almost any place that doesn't require the latex source. The other case is because tthe ecosystem is much smaller so if you need a specific extension that does not exist or is not trivial to implement you'll be out of luck, and you'll be stuck with latex.