The Power Of Readline

Anybody use this program? It seems end up in surprising but useful places.

For me,

 + rlwrap - I use this even for mail(1) although it complains about it lol
 + rlwrap & ed is very nice. Maybe cheating at ed. It's like ed + emacs
 + readline bindings are common in apps on Mac OS like Safari and Notes
 + rl mode in edbrowse. Niche but powerful

at the expense of perhaps sounding like a noob, what's the advantage to using
readline over, say, echo? it appears to be similar in nature from what i can
find

readline gets a line from a user while echo is to meant to display a line of text.

right, apologies- what i had meant to say was `read`. (i was that anon, i'd
just forgotten to log in)