Mike,
I haven't seen jagged edge bunkers at many places in the south.
And where I have, it seems the folks have the budget to take care of them. Ate breakfast at Chechessee Creek couple of weeks ago, and this very young Coore & Crenshaw course also has the jagged edge look.
But, at ANGC, where budget is not an issue, the various architects (and I presume the leading members) have held onto the bunkers with the long straight lines, with large radius edges, with high flashed faces, for many years now.
The size and scale of the ANGC bunkers does seem fantastic and to my eye is the overriding aspect of the bunkers.
Back on thread, the jagged edge look does to be making a comeback, primarily at high end courses, and I presume there will be the odd course or two who regrets that decision later.
It seems only a few architects are using jagged edges and mostly at high end courses.