The problem is if they are not interoperable with others seems like they die a slow death. How do you get all your friends to change chat apps you don't they are all captured in central monopoly who stores and manages their posts photo's and content. Apps really are just software renamed for the benefit of app store silo funnel for owner's monetization fleecing devs and users really a suckers game. Here is a new shiny chat app called Jami notice the problem right away there are a lot of gatekeepers to install, Jami no personal information required of course not needed, gatekeepers have all your information already.