Kind of, but not 100%. At least not in the case where you get a machine with non-ECC RAM and later need something more workstation-class with ECC RAM for whatev

Kind of, but not 100%. At least not in the case where you get a machine with non-ECC RAM and later need something more workstation-class with ECC RAM for whatever reason (scientific, research and whatnot). But in general it speaks to the anti-consumer behavior of Intel.