as long as the arXiv doesn't accept Typst, it's never going to be a real alternative to LaTeX. and the arXiv maintainers seem either hostile or indifferent to Typst
https://www.youtube.com/watch?v=zNZlAbCOjd8
doesn't appear indifferent or hostile
https://www.youtube.com/watch?v=zNZlAbCOjd8
doesn't appear indifferent or hostile