Standard SMS/MMS are the de facto standard in the US
SMS have been used extensively around the world. That’s texting in it’s original form. And we still use SMS to bootstrap WhatsApp or Signal.
But MMS? Phones and carriers have supported this long before smartphones, but did people really use it? Are MMS free in the US? Because in Europe, before WhatsApp and Signal took over, the was a price tag on SMS (last non-zero price I remember is 0.09€, now free) and MMS (no idea because no one uses it, but I believe 0.39€ was typical at some point).
Every time, I’m ready to jump the Ubuntu ship and go back to Debian or Mint, they announce something interesting; something I’d at least want to try.