I just read the post (you linked) by signal. Note the use of the word “plaintext”.

we don’t have a plaintext record of your contacts, social graph, profile name, location, group memberships, groups titles, group avatars, group attributes, or who is messaging whom.

Whenever someone qualifies a statement like this, without clarifying, it’s clear they’re trying to obfuscate something.

I don’t need to dig into the technical details to know it’s not as secure as they like to present themselves.

Thanks. I didn’t realize they were so disingenuous. This also explains why they stopped supporting SMS - it didn’t transit their servers (they’d have to add code to capture SMS, which people would notice).

They now seem like a honeypot.