I've had a noticeable amount of cheaper (WalMart) LEDs burnout in less than a year. But my Philips Hue lights have been running strong 4+ years now :)
All are still working fine for both of us.
I went around after installing them and measured their light output. A couple years later I went around and measured again, and there was little or no detectable reduction.
[1] they were a particularly good deal because the electric company here and Walmart had made some sort of deal that marked the 60 W equivalent and 40 W equivalent bulbs down to $0.17 each.
Also note, these are spotlight LEDs that in the past were halogen, and not your standard sized lightbulbs, which are probably a few generations ahead in terms of manufacturing.
As this video says, Philips don't even make these bulbs with GU10 fittings, probably because they can't achieve the necessary reliability.