this is pretty much standard for any modern PC as well. semiconductor manufacturing isn't a precise process, and finished products need to be tested and sorted based on thermal/frequency/voltage properties and stability. They're then tiered/labelled with a "certified" minimum designation, but market demand and price segmentation may also require "derating", or even disabling certain features. It may not always make sense to design and manufacture physically different products (economies of scale...akin to airline ticket pricing, in most cases, airlines don't use 3 different aircraft for 3 different cabin classes, but put all customers into the same aircraft; marketing departments try to segment customers and maximize revenue, based on guesstimated willingness/ability to pay, and availability: they also try to sell the entire "batch" of seats, eg fill the aircraft, and may also offer "upgrades", based on availability, to "unlock" various extra features)
