"So in moving it to GitHub, we’re finding that a lot of things are just nicer because a large paid staff of engineers is working on it every day. And I grew up during the heydey of the Free Software Foundation, so I know this is a trap, but I’m tired and don’t have the energy to be a server admin for something that’s held together with scotch tape and prayers when I’m really supposed to be writing OpenGL code." This…
This is why I continue to be fascinated by FreeBSD, I don't use it for much but when I do, what I'm trying to do almost always works right out of the box.
My point is that is all comes down to packaging, which is done everywhere. Docker is so popular because debian-style/rpm-style/etc packaging systems and the maintainers of said packages do a pretty uneven job of making things work without luck or fiddling (or having to have package specific knowledge about how to do something obvious). Docker doesn't really do a great job either, but it has a different set of problems and having the old ones gone is nice.