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When using encrypted chats is it not secure? I thought the biggest problem is that we simply don't know - but your comment seems to suggest it's been proven insecure even when using encrypted chats?

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The problem is that people misunderstand the security model in Telegram, and believe that it's e2ee. Except that most features are not, only secret chats are e2ee, and people mostly don't use those (because the whole point of Telegram is the nice group features).

> only secret chats are e2ee

IIRC audio and video calls are E2EE as well (in addition, the four emoji that appear on a call allows both parties to check that no one is eavesdropping)

That's not an addition: e2ee requires a way to verify keys. Without that it's not proper e2ee.

The main reason to not use e2ee is being able to access, send, and receive messages concurrently on multiple computers at the same time.

Yes, and that's a choice. You can choose UX (Telegram) over privacy (Signal), and I am fine with it. Just don't pretend that Telegram is private.

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