> the status quo (SMS/MMS)
There are countries that aren't the US. I honestly don't remember when was the last time I've actually sent an SMS. 99% of SMS messages I receive are notifications and 2fa codes. If anything, "status quo" over here is Telegram and VKontakte.
Besides, the issue with SMS/MMS is that it's a closed system tightly controlled by carriers. The internet is an open system.