Clubhouse, an app which allows you to join audio conversations with other people (a function unavailable in any other app or device), is now worth $4 billion. The user experience mostly involves joining a group chat where a few people are talking and listen to them go on in an unstructured rant about something, kind of like a live podcast that sucks. It immediately reminds me of the big rush to make mobile livestreaming apps in 2015 - remember how Meerkat “