Not really needed when your IME is spying on you. Signal in such an arrangement becomes security theater. They acknowledge this is a problem on their support site but never make any attempt to educate new users to the app: https://support.signal.org/hc/en-us/articles/360055276112-In... . It is arrogant to dismiss concerns about commonly-used IME's when people rely on this app for their own protection.
This was discussed previously on HN if anyone's interested in reading about the response, or lack thereof to the criticism: https://news.ycombinator.com/item?id=25758995
>free and open source
Want to also point out that months go by without server code being published: https://www.xda-developers.com/signal-updates-public-server-...
Also, when users protested reliance on Google's store, analytics, and play services, Moxie chose to attack the forks and made us wait for years to get a direct APK without the requirements available off their site. I acknowledge that there's legitimate reasons why this was done, but all we get are excuses and silence for long periods of time when these problems crop up. It is not in the spirit of opensource/free software development to attack your own community.