I won't miss 2G GSM. Just like I don't miss CSD/GPRS..I'll miss the 2G GSM network when they start to actively phase it out. Until then, 2G GSM starts its long, painful decline this year.
This looks awfully similar to 1G AMPS decline and eventual sunset.
It's terrible sounding, it's sloooow, and just plain sucks at the fringe of coverage.
In any case, the decline on GSM with AT&T started when AMR-HR is used pretty much all the time...even into the wee hours of the morning. The faster AT&T adds more carriers on 3G, the better the service becomes.