Well, I've abused vigorously used a lot of 'consumer' hardware with little or no reliability issues for years, with the exception of some truly cheap and nasty PSUs. Your much-vaunted 'enterprise grade' doesn't necessarily have all that much to do with reliability.
Oh, believe me, it does. Just because you didn't experience any issues doesn't mean that there is any equivalence between consumer grade hardware and enterprise grade hardware.
It only means you got lucky. Which is fine, everyone needs to decide for himself if the odds are worth it.
But, what I really wanted to point out is that the whole attraction for RAID5 in the first place was that it was the cheapest possible solution in that it used the least number of hard drives with the least capacity loss due to the room used for parity. It sucked from every other possible perspective. Is there even a plausible use case for it these days?
Obviously yes, which is to increase the availability of local storage without incurring excessive costs. Which has always been the whole point of it, back then and today. And for that it works well, simple as that.
And no, RAID5 doesn't "suck", it's still one of the most widely used RAID levels for internal disk storage. And demand for RAID5 is still so large that every HW RAID controller on the market supports it, in addition to a lot of software/chipset RAIDs (which originally only supported mirroring).
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