Overleaf are not benefactors that develop LaTeX for economic gains, unlike the situation with Typst that rely on it (to my knowledge). LaTeX is also cross platform, supported in tons of editors and can easily be converted to other formats with pandoc. It is also somewhat supported in other formats using implementations such as KaTeX for Markdown and Mathjax in HTML due to being the defacto standard for math typesetting.

Writing papers in LaTeX is a joy, not a pain. The end result is also a beautifully typeset document rivalled by none.