Re: @Doctor Syntax
But you said it yourself:
"CAN be configured to" as opposed to vim's IS configured to.
Vi out of the box isn't configured to do that, and the user has the choice to do so. Whereas vim is the opposite, it is configured out of the box to hide them. And, unless you know that that is a feature of vim, and in fact if you even know you ARE using vim (most Linux's these days symlink vi to vim, so you could be using vim without realising it - initially at least) then you might not even realise it's not showing things you'd expect it to. That can cause all sorts of trouble.