I wrote that under the assumption that the AS Mac Pro, and an M2 Pro Mini, will be released in late 2022, which would mean the Intel Mac Pro and Intel Mini will be discontinued this year. In that case, an Intel support EOL of late 2026 would indeed be four years after the last Intel Mac is sold by Apple (not including refurbs, etc., of course).As far as intel based Mac Pro customers there still isn't an Apple Silicon successor to that Mac workstation that offers a modular upgrade capacity. So the discussion of when intel CPU based Mac products cease to have MacOS support is likely a lot further off.
Apple said they planned to complete the transition in two years*, and I assume they would like to meet that deadline. [*Two years from the Nov 2020 release of the first AS, if not two years from the June 2020 annoucement of the transition.]
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