I come at it from a slightly different angle.
I write technical blog posts with visualizations and live demos. That usually means embedding a bit of custom javascript in the page for the demo. Or shipping custom wasm to enable extreme semantic model compression.
I do this by pushing content from my machine to github pages which is wired up to my subdomain.
If github pages stops being a good, free option for this, I will find another. Not sure I would call this "hardcore" really.