punkisundead [they/them]

Teachers are also part of an oppressive system and should be treated as such

I got a one time password via SMS to confirm I am the one with access to this phone number.

Idk about that. Signal is the main alternative to WA in some parts of europe.

Matrix results in way more meta data and through federation those meta data could be stored jn way more places. Besides their main developer (element messenger) are cop / military boot lickers. Those are some examples for why you might not use it, but depending on you use case you might still prefer it over signal.

Especially after Telegtam started working with authorities and handing out user / chat info.

From my experience with that: Telegram restored all unecrypted chats when I swapped phones without asking me for any passwort / key. I literally just confirmed my phone number and all my chats / groups / contacts appeared.