This is very damaging because everyone has SMS/MMS by default. I still use this technology which has recently improved with RCS (which with Duo allows it to compete with other messaging services). Obviously RCS doesn’t work with iOS….
Now that you have stopped the excellent iO, what do you recommend?
Not very practical between friends who have either WhatsApp or FB Messenger (which I use), Signal, Threema, Telegram etc.) which is why I like SMS / RCS (Google Messages)