> Basically AMD missed the opportunity to be first mover on a market which is now huge with a project Apple proved to be viable three years after the planned AMD release. Any way you look at it, it seems like a major miss.

I don't think this is a fair position. It could as well be that focusing in K12 would have delayed Zen, maybe delaying it enough that it could have become irrelevant by the time it got to market.

Remember that while Zen was a good CPU, the only reason it made as much impact as it did was because it also was released in a good time (when Intel was stumbling with 10nm and releasing Skylake refresh after Skylake refresh).