Great marketing. I wonder the sales difference if they were also selling Macs with current generation AMD Ryzen chips manufactured on a modern TSMC node.
I think they are so good at building CPUs that fit their designs why do they need to rely on AMD keeping pace with them? I bet you Apple increase performance 20%+ per year for a decade while at some point AMD will slow down their improvements. Never mind the whole issue with heat and battery life where AMD is miles behind.
That's just false. AMDs newer U models have TDP and performance per watt at the same level as the M1.
Apple has other advantages with the M1 (like running iOS programs, more optimised for their software and so on), so they still benefit from having their own chips. M1 is great, but it's not magic.