Apple are doing what they have done every single year - retiring old models from their supported lineup. Film at 11.
Every year, a range of Macs pass through the range of support status from "Supported" to "Vintage" to "Obsolete"
Vintage products are those that have not been manufactured for more than 5 and less than 7 years ago. Apple has generally discontinued hardware service for vintage products in most regions other than the state of California and Turkey.
Obsolete products are those that were discontinued more than 7 years ago. Apple has discontinued all hardware service for obsolete products with no exceptions. Service providers cannot order parts for obsolete products through Apple.