In my area first everyone dropped messenger because some people had no accounts and moved instead to Whatsapp that guarantee that if you had a phone you could have easily an account in a matter of seconds (download and install) without having to create a full profile on some site you could not care less ( at this point of time in my old account no one is writing anymore in his home but instead using it just as a news aggregator).

Then everyone moved to Telegram because it allows you to share your account to others without giving them your personal number.

It is just a matter of time and everyone will move to the most simple system for the specified purpose