ripgrep[1] is usually mentioned in the same breath. I use them both daily. Truly indispensable.
Seconded. Fzf didn't stick with me, but Ripgrep I use a dozen times an hour. It's incredibly fast, and mostly does exactly what I want.
I think you have to really love the idea of creating an app/script or hot key for a work flow to really start to enjoy using 'fzf'. And for most, I get it, it's "Where to start? Ugh, looks like work."
For those that haven't tried yet, and want an entry point, I'd highly recommend you play around with the 'fzf' key bindings and completion scripts for zsh[0] to see what's possible. A little app of mine[1] also has an example of what one might call the minimal viable hot key script for you (note: for skim or 'sk', a 'fzf' Rust clone).
[0]: https://github.com/junegunn/fzf/tree/master/shell [1]: https://github.com/kimono-koans/httm