Remember when Google was toasting away to get everyone to use Hangouts for SMS? A few weeks ago, I got a toast in Hangouts asking me to use their new SMS-only Messenger app. You never know.
But to be fair at my university there are also a lot of students that drive brand new or fairly new cars too and I've parked beside too many Porsches the student parking lot.
Plus, data plans are available everywhere now. For the most part, I use only data. Also, SMS doesn't work when you have to keep switching SIM cards and phone numbers. I can't login to half of my accounts that want to do SMS verification because I registered those accounts using a different SIM card in a different country; I have to wait till I return to those countries before I can login to those accounts and do something about them.
E-mail doesn't have this issue. I've had one e-mail address that has been associated with me for 15+ years that has worked 24/7 internationally. Phone numbers have to practically change every time you step across a country border. Phone numbers are a horrible way to identify me, at least.