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Samsung joins Google in RCS shaming Apple
(www.theverge.com)
This is a most excellent place for technology news and articles.
I think this issue is mostly a USA one, considering that most communications there have caps (data, phone time, SMS etc.) Paradoxically, the market there doesn't work very well and prices are relatively high. Big corporations take advantage of it to lock people to their ecosystems. There is a high probability that this issue, will be regulated by the EU, since US policy makers are unable to solve much more important problems. For them this is not an issue. The market has solved it.
I'd argue the SMS/MMS reliance in the US is entirely because there have been no caps on it for years now. Nearly all plans you can get here have unlimited SMS/MMS included, even cheap prepaid ones.
Having a fixed allotment of texts or minutes hasn't been a thing for over a decade at this point, and the only thing that's expensive now is data.
That was my understanding. I was told one of the reason for growth in apps like Whatsapp outside the US was that data was cheaper than texting (probably just per message cost).