No vundle for this one.

Out of curiosity I checked out if Vundle would give me YouCompleteMe but... vundle installation of YouCompleteMe just failed with `The ycmd server SHUT DOWN (restart with ':YcmRestartServer').YCM core library not detected; you need to compile YCM before using it. Follow the instructions in the documentation.`.

I love Vim but I have stopped trying to build a cathedral for it.

Excuse me but the error you are getting makes it clear that you have to compile YCM before using it.

I thought vundle can install any plugin if it is hosted on Github?

Vundle is really neat and so is vim. But some plugins requires external binaries or services to function and that's when a vim packager stops being helpful and you have to take extra steps. Sometimes it's just an apt-get install something or curling a bin to ~/.bin but sometimes it needs more tweaking and fiddling. In my opinion that makes your vim installation more fragile and less portable.

Maybe we'll soon run vim in docker.

Vundle does install YCM, but you need to execute some more steps (compile the ycmd server), which vundle doesn't do, and YCM doesn't work without the daemon compiled.