Ask HN: Is there innovation in non-virtualized non-containerized shared hosting?

I read http://adamierymenko.com/ports.html and thought it was interesting. I think there is a lot I need to understand to fully understand it - so be gentle. But I think it is trying to say if you had bear metal, install (a patched?) Linux on that, you could use the built in user permissions to host multiple applications separately, and it would be secure.

Is there any providers that provide this sort of hosting? Is this kind of what those old school "shared hosting" PHP-type hosting providers (like Hostgator, for example) are providing? Or is that different. I guess those are more locked down, you can't just run anything, but they normally come with Ruby, PHP, Node and so on.