Quick plug in occasion of the Global Accessibility Awareness Day: BookML is a collection of CSS, scripts, and make-based magic to convert (largely unmodified) LaTeX files to HTML with as little pain as possible. The hard work is done by LaTeXML which pops up here on HN every once in a while, more often now that arXiv uses it for its accessible preprints effort.

BookML is mainly aimed at HE staff working with LaTeX everyday and not having realistic chances of changing tech stack (due to workload, collaborators, and so on). Not to mention, there are virtually no alternatives to the kind of flexibility, extensibility but also longevity that the LaTeX system has to offer. Theorem numbering for instance is something that is routinely neglected by outside of the LaTeX ecosystem and makes many potentially great options (such as Quarto) not viable. BookML also creates SCORM packages, which makes uploading files to most LMS's straightforward.

So if you work in a Maths department and are trying to get people to move past inaccessible PDFs, BookML is a surprisingly viable option to scale up the effort while not disrupting people's habits.