It is very hard to explain the extent of it to a person who did not experience it, really.

I have over a decade of experience, I do this stuff daily, I don't think I can write a 10 line bash/python/js script without looking up the docs at least a couple times.

I understand exactly what I need to write, but exact form eludes my brain, so this Levenshtein-distance-on-drugs machine that can parse my rambling + surrounding context into valid syntax for what I need right at that time is invaluable and I would even go as far as saying life changing.

I understand and hold high level concepts alright, I know where stuff is in my codebase, I understand how it all works down to very low levels, but the minutea of development is very hard due to how my memory works (and has always worked).