Here's my data point: I used to use Signal but then stopped using a smart-phone for a year, and I very quickly discovered that unlike other chat systems (like M

Here's my data point: I used to use Signal but then stopped using a smart-phone for a year, and I very quickly discovered that unlike other chat systems (like Matrix) Signal is so tied to you having a smart-phone that you can't use any desktop communication method. The Chrome App pairs with your phone rather than registering a new device. (Also, it's kinda funny that Signal has reimplemented the iMessage problem -- you have to unregister your phone number on your website so people can SMS you again rather than continuously sending you Signal messages unintentionally.) (There are also other problems that have bubbled up in Signal in the past year since I stopped using it -- I've heard there's an auto-backup process that takes more than an hour and makes your phone unusable and you cannot change when it happens.)