I once saw Bram Moolenaar do a Q&A on Vim. Someone asked about some feature or the other and Bram didn't really know how it worked from the top of his head, "be

I once saw Bram Moolenaar do a Q&A on Vim. Someone asked about some feature or the other and Bram didn't really know how it worked from the top of his head, "because I never really use it". Shells are large programs. Everyone is unfamiliar with some bits because it just doesn't fit in their workflow.