I know that in the past, when you fought to upgrade a machine past Apple's recommendations, you could end up with a machine that was technically working, but so slow it was practically unusable.
It's possibly the case that Apple's lack of upgrade support is a feature, not a bug (though it introduces the complexity of eventual lack of security support).
It's possibly the case that Apple's lack of upgrade support is a feature, not a bug (though it introduces the complexity of eventual lack of security support).