Comment by miroljub

In my experience here in Germany, Signal usage has increased drastically in the last two years. When my daughter started a new school, I got enlisted in the parents group on Signal. Previously, parent groups or anything similar was an exclusive WhatsApp territory.

As for Telegram, people mostly use it to consume news. It basically replaced RSS readers for common people. Although its install base is relatively high, I have yet to receive a single private message over Telegram.