The fediverse had heated debates about where whatsapp users should move.
Signal was declared better than Telegram because their server is closed source.
But really both options were close sourced at that point. The only difference is that Telegram was upfront about explaining why their code wasn't open. While Signal wouldn't even acknowledge that they had betrayed the good will they've been coasting on for nearly a decade.
Mastodon Community of Denmark (MCD) for Danes and other people to talk about Denmark or whatever.