Knowledge of (including pronunciation) jargon is a classic gatekeeper
In my experience, I'm in the minority in pronouncing sudo as soodoo, the majority seem to say pseudo. OTOH I've never heard anyone say fsck as anything other than f-suck
From personal experience at Microsoft the backslash was frequently pronounced "whack" (hence whack whack for unc paths), and the ubiquitous error codes like 0xC0000005 were "c-bazillion-5"