8 years old - yeah, Personally I fully expect failures at any time, just expect them, but am not unhappy when they don't happen either.
I put in 40 new VOIP phones 10 years ago, starting around 7 years, when we lost power long enough to take the switches down, we started having phone failures - they wouldn't power back on.
I actually was talking to @scottalanmiller about a related thing - stickion - when you turn off a computer with drives in it that when the drives stop spinning, they don't work anymore because the heads stick to the platters.
I'm not sure how often this really happens anymore, but it is a real thing. Scott said that the recommendation is to not allow drives to spin down in these situation when possible.
These 8 year running devices are just the same as my phones and those HDDs.