In MacOS 13 (Ventura), iOS 16, and iPadOS 16, in so far as the limitations of the SMS/MMS system permit, Apple is using their servers to handle SMS/MMS traffic instead of dismissing them to the telephone network, thereby providing Apple users essentially the same experience for both iMessage and SMS/MMS traffic. Moreover, Apple provides the ability to cancel or edit messages, within I believe it is ten seconds of the message being sent. Interesting, though I can't move that fast. How about 10 minutes?
I have the same question, but obviously the technology depends on holding the message on the Apple Server before sending it along to the recipient. My guess is: Apple feels 10 seconds is the maximum delay senders will tolerate, and it does provide a window, albeit a narrow window, of time to cancel or edit the text.
