Facebook Messenger added required end-to-end encryption. If you don't opt in, you won't be able to read your own messages across devices.

I love end-to-end encryption that purely relies on a numeric pin code, it will be so hard for Facebook to guess my 6-digit pincode with unlimited attempts if they ever want to read my correspondance.

Or is it to prevent hackers from accessing messages? Well we had a tool for that, it was called Passwords and Passkeys!

Explainer: This way of making end-to-end encryption is useless and it would have been better if they just didn't do it at all then.