I don't think there's a subculture that doesn't use jargon/shibboleths as a gatekeeper, and that jargon has to have turnover, otherwise it ceases to be useful (

I don't think there's a subculture that doesn't use jargon/shibboleths as a gatekeeper, and that jargon has to have turnover, otherwise it ceases to be useful (when was the last time you heard "helicopter view"?) Viewed from an anthropological perspective, keeping up with the jargon is just an expected cost of belonging to a subculture, and as an industry we're more guilty than most (look at the sheer amount of new language we coined for Software Patterns, or Agile).