@izby @signalapp I don't really care what happens to them since I rarely use them. It would be better for everyone if the 3B people on WhatsApp and billion on Telegram also used Signal, but that's not currently the case.
WhatsApp has been Zucked since 2016. Constantly screaming about how private and secure it is while not being open-source means it's probably not secure or private, and even more so when it's a Facebook product.
Everything you do on Telegram is stored in plaintext by default on Telegram's servers, it has a long history of sketchy security, was created by a Russian billionaire, and has been banned, unbanned, and could be banned again in Russia. There was a report in October last year that Telegram is very likely an FSB Honeypot: https://rys.io/en/179.html#:~:text=The%20assumption%20seems%20to%20have%20always%20been,this%20is%20much%20less%20of%20a%20consideration.
I have WhatsApp and Telegram, but I don't do much on either but lurk in sports channels.
This is why I stick to Signal for all my communication. They don't have data to hand over because they don't collect it: https://signal.org/bigbrother/