Everyone knows, because anytime anyone talks about SMS/MMS/RCS somebody comes in to remind people that it’s mostly a US thing. SMS/MMS started to become cheap in the early 00s in most of the US (and unlimited free for users of the same carrier was common) and as carriers raced to compete by the late 00s, unlimited SMS/MMS was commonly free in the US, even to users outside their own carrier. All carriers had interoperability with SMS/MMS already. Even iMessage falls back to SMS/MMS outside of iMessage. It is pretty logical that SMS/MMS became what most people used in the US.
Elsewhere, Whatsapp came out when much of the rest of the world was still paying for the number of text messages sent or they could use a miniscule amount of their data and use something else.
Everyone knows, because anytime anyone talks about SMS/MMS/RCS somebody comes in to remind people that it’s mostly a US thing. SMS/MMS started to become cheap in the early 00s in most of the US (and unlimited free for users of the same carrier was common) and as carriers raced to compete by the late 00s, unlimited SMS/MMS was commonly free in the US, even to users outside their own carrier. All carriers had interoperability with SMS/MMS already. Even iMessage falls back to SMS/MMS outside of iMessage. It is pretty logical that SMS/MMS became what most people used in the US.
Elsewhere, Whatsapp came out when much of the rest of the world was still paying for the number of text messages sent or they could use a miniscule amount of their data and use something else.
We know. It always comes up.