I don't know what you refer with "signal under attack" maybe I missed some news?

I was merely steelmaning the case for "telegram friendliness" among bitcoiners.
Lately I always get in touch with people in nostr via SimpleX, no one mentions telegram for DMs.

Due to the phone number requirement, I think Signal is more appropriate for IRL friends and family, where your number and identity is already doxxed. Usernames don't quite fix this. 

 I totally agree, I use signal for daily driver with the people I trust, I use simplex/threema for others. 

Yet phone numbers are still the best web of trust that exists. 

 signal has usernames now 

 oh sorry I misread you, my mistake