'When I became unhappy with my current provider / traveled to another country / didn't want a monthly plan and fixed fee, I simply bought a different SIM and popped it in.'
You mean, you changed your cell service by changing the 'memory card'? You didn't have to pay $40/month (or equivalent) for 90 minutes of phone calls? You're not locked into a 2 year contract? You don't get caught and screwed over with roaming fees (remember those)? (Different SIM card for the different country.) THEY DON'T $0.10, $0.20, WHATEVER PER TEXT MESSAGE?
I'm probably forgetting many of the other "astonishing" differences.
All you needed to do was have an "average" U.S. person talk for 2 minutes with an "average" European about cell phone use, and the American was ready for a change.
P.S. I realize this is sarcastic, but I suppose this change will end up getting someone charged with a felony for "hacking", at the DOJ's or other law enforcement organization's convenience.