I think that might be true at some maths and computer science meetings but is unheard of in other scientific fields.
I also don't see the need for journals and conferences to make a typst template for exactly these reasons. The templates will have to be community-made and then you still run the risk of having a paper rejected a year from now because the template is outdated.
[0] https://conferences.miccai.org/2025/en/PAPER-SUBMISSION-GUID...
[1] https://github.com/apoorvkh/cvpr-latex-template
[2] https://www.nature.com/nature/for-authors/formatting-guide
[3] https://www.science.org/content/page/science-information-aut...
I'm probably showing my bias here, but I'm (respectfully) surprised that, say, poets would want to work in LaTeX :)