This is a good thread. I like how carefully they take responsibility for where they could have done better, and at the same time very clearly state what isn't a problem with Signal.
A response to recent reporting in Germany, in service of clarity and accountability:
First, it’s important to be precise when it comes to critical infrastructure like Signal. Signal was not “hacked” — in that our encryption, infrastructure, and the integrity of the app’s code was not compromised. 1/