My understanding is that that is a maximalist position for the avoidance of risk, and is sufficient but probably not necessary.

https://en.wikipedia.org/wiki/Anaphora_(rhetoric)

History search, like in shells. My most used TUI shortcut!

A very important thing about constraints is that they also liberate. TUIs automatically work over ssh, can be suspended with ctrl-z and such, and the keyboard focus has resulted in helpful conventions like ctrl-R that tend to not be as prominent in GUIs.

I'm not a professional, but to me it's clear that whether i and -i are "the same" or "different" is actually quite important.