There's also a large, and probably growing number of open source projects hosting documentation on Netlify/Vercel. Somebody's definitely going to use it, and if

There's also a large, and probably growing number of open source projects hosting documentation on Netlify/Vercel. Somebody's definitely going to use it, and if it has enough other advantages, people will notice and migrate. And GitHub might one day support path-based SPAs, it's old news at this point. I still remember GitHub Pages being an https holdout for many years.