[TeMPOraL]

Unfortunately, I think it's just because there is no single organization pushing it. One that would be the recognizable brand, one that would engage in marketing, and spend time and effort streamlining onboarding.

There were in the past - Slack basically bootstrapped itself off the back of techies, with the IRC transport making Slack seem like a prettier IRC... only to shut down the IRC transport once they've entrenched themselves on the market.