foss nerds stop being condescending to those who don't know the same things you do challenge (impossible)

An edit of xkcd 2501, "Average Familiarity":[Ponytail and Cueball are talking. Ponytail has her hand raised, palm up, towards Cueball.]Ponytail: Open-source alternatives are second nature to us foss nerds, so it's easy to forget that the average person probably only knows Linux and one or two degoogled Android ROMs.Cueball: And Firefox, of course.Ponytail: Of course.

[Caption below the panel]Even when they're trying to compensate for it, experts in anything wildly overestimate the average person's familiarity with their field.