Concerning F-Droid, we already providing an auto-updating APK directly from our site, and we really don’t want forked versions of the app maintained by other parties connecting to our servers. Not only could the users using the forked version have a subpar experience, but the people they’re talking to (using official clients) could also have a subpar experience (for example, an official client could try to send a new kind of message that the fork, having fallen out of date, doesn’t support). I know you say you’d advocate for a build expiry, but you know how things go. Of course you have our full support if you’d like to fork Signal, name it something else, and use your own servers.
While that statement got plenty of thumbs down, I hate to admit that F-Droid is indeed out of date quite often. I currently can’t find a source for this but I once read this has something to do with their signing process.