I am in Australia, and just going back through my messages list on my phone, I can see that my wife, my massage therapist and doctor/dentist etc. are mainly who sends me texts these days, oh, and my telco also does voice to text translations and send the transcripts to me via SMS.
I do recall that my doctors office did offer the option of Snapchat recently, I believe, for appointment alerts. Also, the voice to text thing, I have been thinking of writing my own little app connected to my SIP phone system and Amazon AWS to try and achieve the same thing, just as a little programming exercise.
If I have to be honest, if my SMS was turned off tomorrow, there would be very little impact on my life (as long as I installed Telegram or Snapchat on my wife's phone).