Before AI it was HPC that was obviously becoming huge. AI is the most recent and buzziest form of HPC, but people have been buying AI-style clusters for a while. The Knights [*] products were a great entry point into that market if they would just figure out the software of it. Knights [*] essentially had Atom cores with huge SIMD units, and fast forward to today, an AMD GPU is essentially a small scalar core attached to a huge SIMD unit.

IMO it seems like they had the Google problem: if you can't sell a billion units it has to be canceled.