They also have to consider the $ cost of the GPU and time to earn back the initial investment. The AMD 5000 series and 3080 were already more popular than the 3

They also have to consider the $ cost of the GPU and time to earn back the initial investment. The AMD 5000 series and 3080 were already more popular than the 3090 for miners because of the hashrate/$ - considering you can't slot more GPUs into a M1 Studio and need to buy a whole other system, I'd imagine that it's current price would leave it uncompetitive for miners even if it did match the 3090 perf. (nvidia had the same issue with miners still preferring their LHR consumer card to their attempts to push miners to their business tier cards)