Companies that optimise for memorising obscure stdlib functions don't seem like great places to work.
I've got an abstraction that I think in that then needs to be translated to code. e.g. if I want to append to a list, I think "push to list", regardless of language/framework/whatever. Then somehow my hands will translate that automatically to code in the language I'm working in. If I'm not in my usual editing environment, that magic just sort of breaks, and I just look incompetent.
It's not a huge deal, but I have to actively sit and memorize that stuff before an interview. Usually by writing it out on paper or writing it in some foreign editor that I'm not used too.
It probably wouldn't be _too_ bad today, because I just sit and write Typescript everyday, but when I was switching between perl/ruby/python/tcl/kotlin/javascript/bash/csh/lisp my brain was basically mush. I couldn't tell you how to do any basic operation in any language.
Thank you for putting all of that into words that I can look at and go: that's exactly how my brain works!
I don't think everyone has that issue or can understand it. I think in more abstract terms (the problem and how to solve it) and more often than not the syntax is just an implementation detail that I prefer to increasingly outsource to my tooling.
But I do think most of what I use has grown into my muscle memory naturally, rather than memorizing anything.