Fun fact: Mark Jackson is 1-0 in playoff series against George Karl
It didn't work because they fired Sam Hinkie and Bryan Colangelo and Elton Brand undid basically all of the good work he did except Embiid and Simmons (who are now way more expensive than they were). Brett Brown deserves some of the blame (and to get fired) but not majority IMO. I hope he gets another shot at a NBA HC job (My Maine bias might be speaking) because I think he'd be a great fit for a rebuilding franchise.
I'm now seeing fans saying that it was a bad idea to begin with and they should have just kept core of their 2012 playoff team...which, just, no. It was a shot worth taking and I think someone following Hinkie's blueprint can make it work eventually.
Really not sure how (or why) Danny Ainge would pull this off.