[growse]

> Why? It hasn't changed in years.

It has though. RCS has come along, which means that you might send an SMS to someone, and their response gets "upgraded" to RCS. If your app doesn't support RCS (and it's impossible to support RCS right now, because the APIs aren't available), you'll never see it.

The choice is between "Keep maintaining the functionality and have people get progressively angrier that their messages are going missing" or "drop it entirely".