Encrypted enough to have conversations like this on it without law enforcement being able to crack down https://www.bbc.co.uk/news/articles/cgr5nen5gxyo

Exactly. I‘ve never had a chat on Telegram with E2EE that wasn‘t originated by myself. My guess is less than 1% of Telegram is E2EEd. Probably less than 0.1% even. After all, they don‘t offer E2EE for group chats at all.