You don't remap the function keys to do stuff? I use F1 and F2 to switch between tabs in tmux for example. In the past I have also have mapped the function keys on the right side to run common scripts, like deploying an app staging/production.
I guess that it comes down to I have never liked the function keys because they pull my hands off of the home keys, and I never could accurately hit the F keys without looking for them.
Long ago, when I was using apps that made heavy use of the function keys, I mapped ctrl-alt plus a number for to the function keys. I use to love the Happy Hacker Keyboards for have this built in.
