True, but if upstream is worried enough about it to put a disclaimer there, and you trust them to write non-malicious code, I’d listen to them if they say something may be unsafe. I believe more than just the cryptographic code has been audited in SimpleX, but I can easily imagine CoyIM might become better if development does resume.
Good to know, thank you for linking that.
Worthy of note, it looks like CoyIM used to be included in Whonix but was removed due to it being removed from Debian: Instant Messenger Chat I wonder if it’s back again now?