Apple also helped a lot indirectly. They have been spending billions on R&D for their SoC's and outsourced the production of the waffers to TSMC which used Apples R&D money to contribute to their 7nm and 5nm node (though Zen 3 is "still" on 7nm).
Although AMDs and Dr. Lisa Su's achievement are not to be underestimated, I doubt the 7nm processes would be as mature as it is right now without Apple.
Although AMDs and Dr. Lisa Su's achievement are not to be underestimated, I doubt the 7nm processes would be as mature as it is right now without Apple.