AMD was close to ruin when Lisa took over. It had completely lost the graphics and x64 wars and was limping by on low margin games consoles.

Since then Epyc has broken Intel. Anyone buying Xeon's today is at credible risk of being fired over it when someone notices the power bill relative to their competition.

The graphics ramp is behind Nvidia in mind share and market share. The ROCm software stack gets a lot of grief on here. Nevertheless, Nvidia lost the frontier and el cap bids and now Microsoft is running GPT4 on AMD hardware. Sounds pretty good to me given it's one product line of many.

If turning a multinational semiconductor firm away from the edge of bankruptcy and into the profitable conglomerate it is today doesn't qualify as "solving a hard problem" I don't know what would. It's way beyond what I'd be capable of doing.