AnandTech had the opportunity to interview AMD CEO Dr. Lisa Su about the development of the Zen architecture, you can read the lengthy interview over here. The article covers various areas, including problems faced while developing Zen, the strategy for the next couple of years, AMD's financial struggles, how OEMs look at Ryzen, the competition, the launch structure, etc.
Q5: How vital was it to support Simultaneous Multi Threading?
LS: I think it was very important. I think it was very complicated! Our goal was to have a very balanced architecture. We wanted high single threaded performance, and SMT was important given where the competition is. We didn’t want to apologize for anything with Zen – we wanted high single thread, we wanted many cores, but sorry we don’t have SMT? We didn’t want to say that, we wanted to be ambitious and give ourselves the time to get it done.