Our team has started to use Vector daily and slowly progressing to replace both Discord and Telegram in their personal lives first. We're not claiming that it is anywhere near that level for adoption yet, but simply that it is our goal to have a true privacy messenger app that has all the features you would expect of mainstream messengers + more, without complicating or slowing down the UX. We welcome any honest critique and feedback.
If you'd like to just dig around a little more without downloading it first, you're welcome to check out our GitBook which has most of Vector Privacy's ecosystem documented:
https://docs.vectorapp.ioWe are also more than happy to address any questions you may have.