Anyone have any opinion why Wire didn't take of? E2E, good functionality (chat, group chat, video chat, voice chat, GIF images emojis yadda yadda yadda), multi-device, clients for all major platforms (eg for the iPad, unlike WhatsApp), open source, phone number or email as identifier, audited, Swiss/EU servers, no profiling, no ads...
Can't find any downside, really - except that few people are on it.