Anyone that hasn't been exclusively using macOS for their entire digital life, or at least years, anyway.
'Command' (resp. 'Windows', resp. 'Super') is a different story. You can't say 'Super' with a straight face without also marking yourself out as someone who borders on saying 'GNU with Linux', or 'I run Arch'.
(For what it's worth, I do run Arch. ;))
IIRC Option is dually labelled as Alt on some Apple keyboards anyway.
Since basically nobody knows the historical difference these days, I just call it the Meta key to avoid the above situation. When non-techy people ask me what the hell I mean, I just explain that's the technical term for the key and that I use it so both Mac and Windows people understand me. I've even heard one of them start using the term themselves, presumably to appear smarter in front of their boss.
<c-a> = go to beginning of line
<c-e> = go to end of line
!! = repeat last command
<esc> b = move "back" one word (also <c-b> and <c-left>)
<esc> f = move "forward" one word (also <c-f> and <c-right>)
Many others exist. See `man bash` under READLINE.
!!enter which is 3 buttons where as up-arrow enter is the same thing.
See sudo !!.