GitHub Pages was top of the pops in terms of performance, but since doing this research, I learned that they don’t support Jekyll version 4, which is what I run on this site. So if I were to host with GH Pages, I’d need to use GitHub Actions for my build process.

It's not that he couldn't, it's more of an arbitrary self-imposed limitation.

I fail to understand why he needs to use any code generator on GitHub.

What's wrong with generating all static assets offline and just pushing to GitHub? I've been doing it for years.

Complaining that GitHub doesn't compile your source and generate your site is like complaining that the Play Store or App Store don't allow you to push your source code there, and then they do the build for you.

Feel free to write your own analysis that _does_ includ GitHub pages, and submit here as well. I'll upvote it.