His latest project is https://radicalpie.com/
A Professional Equation Editor for Windows 10/11 for 60$ that uses Slug for rendering. Presumably he‘s using it to write his great FGED books.
25 years ago I would have loved that. But I don't actually know many people still doing any of this sort of work on Windows.
(I get it. It's an awesome replacement for MathType. It uses OLE so that it embeds in Microsoft Word nicely. Still...)
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