I never thought I'd have a use for extra buttons all that much. There's always keyboard combinations to spare.

Yet about 18 months ago, I remembered I'd got these 5 custom buttons on my keyboard that in something like a decade and a half of using this keyboard model, I'd never once used.

A little bit of searching later, I figured out how to write a bash script that would (for Linux) find the zoom window for whatever meeting or webinar I was in, and bring that up. Then a second script to do the same but also unmute. That has become so insanely useful I'm really kicking myself about not having used those buttons before.