None of which are anywhere close to as ubiquitous as email. None of which are well suited to long messages. Only one of those (matrix) is federated. Only one (matrix) wasn't designed specifically for use on mobile devices. Yes, the others can be used on a desktop, but the experience isn't great.
None of which are anywhere close to as ubiquitous as email. None of which are well suited to long messages. Only one of those (matrix) is federated. Only one (matrix) wasn't designed specifically for use on mobile devices. Yes, the others can be used on a desktop, but the experience isn't great.