As someone who has had to dig into Docker files to debug weird stuff: you’ll be surprised how often vi is still packaged.

It’s in some distros too. Vim is an optional addition to most simple distro installs so you may end up accidentally opening a fallback real vi and get incredibly confused why your shortcuts aren’t working.

I tried to live the “(n)vim is just a verbose way to spell vi” way, but it’s bitten me enough that I’m willing ti type the extra m.