Comment by matsemann
Working on a huge government form application (lots of pages, sub sections, modals, validations etc), we of course had strict rules about making it accessible. But that made it so much easier to work/debug/test it. It being keyboard accessible made it a breeze to quickly test stuff or get to the needed state. Had muscle memory of like tab, tab, type a letter, tab, enter.
The things I did most often I had bookmarklets for.