Earlier quoted context omitted.
In order to talk to my friends, family, and coworkers I need to have the following apps installed and running: Slack, Teams, Telegram, Signal, WhatsApp, Google Chat/Hangouts/Allo/Whatever, FB Messenger, Discord, Twitter, etc. It'd take a pretty strong argument to convince me that this is so much more productive and allows for more innovation than the old days when the spec for things like Email, HTTP, IRC, XMPP allow…
I'm willing to bet that your friends and family wouldn't be happy if the European Union would mandate using IRC everywhere. Heck, why not go further and stick to the good old ntalk [1]. [1]: https://en.wikipedia.org/wiki/Talk_(software)
WhatsApp is basically an unfederated XMPP provider.