It absolutely blows my mind how many developer-centric search UIs don’t have fuzzy search. Developer tools css editors for one (CSS! The language with margin-* naming conventions everywhere!). Also GitHub issue labels.
I think the people who sell tools or buy tools usually constrain themselves to "least common denominator" type of experiences.
(This might be true of free/shared/common tools that haven't been configured yet)
But getting past all that, after a lot of craftsmanship and idea sharing, that's when tools start to ramp up in productivity.
I use emacs, because if something doesn't work like you want to, you can coerce it to do so. That said I personally wish it was python-based, because I'm more fluent in python than lisp.
Browser history too.