They claim to be working on a "proper" way to support this. See e.g. https://freedom.press/training/blog/beyond-signal-phone-numbers/ https://freedom.press/tra

They claim to be working on a "proper" way to support this. See e.g. https://freedom.press/training/blog/beyond-signal-phone-numbers/ https://freedom.press/training/blog/beyond-signal-phone-numb... I am not aware of a blog post that fully explains their reasoning, and what exactly the downsides are of "just adding the feature". I can come up with several reasons myself, but it would be nice to read a good summary.