It is simple, it continues to keep professional people with large budgets on the Mac. These creative people are often influential to others (an example of this is a music artist I follow on Instagram who basically constantly posts their mobile studio setup that involves a MacBook Pro - free advertising of the most valuable type, organic).

Compare Logic’s cost with a $800/year ProTools subscription and suddenly you might not really mind the fact that the SSD in your new Mac is overpriced. With that price difference it would be illogical to ever move to software that can run on Windows.