Please don't assume that wherever you live is the same as the rest of the world. SMS messages are not exactly unusual in Switzerland, and I've had at least a few friends prefer them in most every other country I've been as well. Naturally, MMS are somewhat less common due to WhatsApp's convenience for group and media messages, but conventional text messaging is almost mandatory for many 2FA services such as the vaccine portals in some cantons, banking, etc.

For instance, SMS seems to be preferred for online selling platforms in which only a phone number is exchanged. It's strange to add a stranger to your contacts for a one-time transaction, so I've often been contacted by SMS or email.