Here's some reading from the time of the change:
https://community.signalusers.org/t/proper-secure-value-secu...
https://community.signalusers.org/t/dont-want-pin-dont-want-...
https://old.reddit.com/r/signal/comments/htmzrr/psa_disablin...
https://www.vice.com/en/article/pkyzek/signal-new-pin-featur...
Note that the "solution" of disabling pins mentioned at the end of that last article was later shown to not prevent the collection and storage of user data. It was just giving users a false sense of security. To this day there is no way to opt out of the data collection.
My personal feeling is that Signal is compromised and the fact that the very first sentence of their privacy policy is a lie and they refuse to update it to detail their new data collection is a big fat dead canary warning people to find a new solution for secured communication. Other very questionable Signal moves that make me wonder if it wasn't an effort to drive people away from the platform as loudly as they were allowed to include the killing off of one of the most popular features (the ability to get both secured messages and insecure SMS/MMS in the same app) and the introduction of weird crypto shit nobody was asking for.
I swear if VLC ever turns evil I'm giving up on recommending software forever (in the meantime, check out VLC if you haven't already!).
I don’t blame you, I think it did start with a good promise initially, but I believe just like anything centralized that turns big, it will become evil.
> in the meantime, check out VLC if you haven't already!
The player? Or is that a new messaging app? For messaging I usually use Matrix/simpleX/Session.
If there was such a hoo-hah and it was trivial to patch out, I expect we'd have a thriving patched fork up and running by now.
"Even under the sealed sender, observers said, Signal will continue to map senders' IP addresses. That information, combined with recipient IDs and message times, means that Signal continues to leave a wake of potentially sensitive metadata. Still, by removing the "from" information from the outside of Signal messages, the service is incrementally raising the bar." (https://arstechnica.com/information-technology/2018/10/new-s...)
A couple years after that "incremental" improvement Signal started keeping everything forever in the cloud which means that today governments can get a signal user's information just by brute forcing a PIN