vi and emacs are prehistoric. Folks now are ok with / and \ and maybe some can deal with : as a file separator.

But in the precambrian era you needed to know about ^ to edit a specific version of a file, because diffs were tracked.

They're both wonderful and amazing and can handle anything, because they had to handle everything when filesystems were like a brand new invention and nobody really knew what was good or bad, so they threw everything in.

Tough to get standards before standards exist.