I was thinking of users who might have phones that have a Twitter app or capability (didn't realize at the time of my comment that SMS tweeting is no longer all

I was thinking of users who might have phones that have a Twitter app or capability (didn't realize at the time of my comment that SMS tweeting is no longer allowed) but no authentication method other than SMS, presumably also without a computer or reliable access to one. Maybe this is inaccurate. However, it still stands that Twitter is pushing people towards the paid subscription by using poor security arguments.