Yeah but if 1 of your customers offers to prepaid for 10 years of service at the same price you wouldn't turn that away. Allowing you to maintain your other customers. Apple's pre-order of 3nm will get them priority as they ordered it before it was an option. (see Kickstarter)
But it's not and it has been documented. Apple paid for the 3nm process years before TSMC had the fab ready. I'll bet that the moment a new process is available that Apple will invest in it as well.
