Our customers at Dolly love receiving SMS. Also helps with low data connectivity locations. Not sure "no one uses SMS anymore" is accurate.
It's still the easiest universal way to reach people on their phones. You can replace it for people that you know, but not if you are ZZZ Pizza and you want to message a customer that their order's on the way.
I have the impression that everybody uses SMS for authentication. Everyone from Bank of America to Uber to even Whatsapp uses SMS to validate phone numbers or for 2-factor authentication.
> no one uses SMS anymore
Except for the 6 billion SMS messages sent each day.