Why is it "required" to let Vundle manage itself?

[n-st]

The main ReadMe states:

" let Vundle manage Vundle, required
Plugin 'VundleVim/Vundle.vim'

Why exactly is this "required"? What are the potential consequences of not having that line in the vimrc?

I'm asking because in my case Vundle.vim is a submodule of my dotfile Git repo, so Vundle throws an error when it tries to update itself (because its local repo isn't a normal checkout of the master branch).
I'd rather just update Vundle manually and only have it update the other bundles automatically.
Looking at #565, it seems like :PluginClean might try to remove the Vundle directory when it isn't explicitly mentioned in the vimrc. I could live with that (I don't normally have a use for :PluginClean anyway), but is there anything else I should be aware of?

[ryanoasis]

You are right it seems to be at least for the case of the clean command.

See the change here: 6af116c

Comes shortly after this issue: #52

Also see: #565

[ryanoasis]

Added a FAQ to the wiki because this didn't seem to go with the index wiki page as this is not a problem as much as just a question, page here; https://github.com/VundleVim/Vundle.vim/wiki/FAQ

Closing this for now 😄