On most systems for the past while 'vi' is just a link to/copy of vim in compatibility mode.

A pet-peeve of mine. I don't want new vim users trying "vi" and having an awful experience ("how do I undo more than once??"), assuming it's not an alias for vim.

I read the lack of mentioning source control this way: it is just assumed that they use some sort of version control system, and for many of them, they are content to use whatever is used in their working environment.