I have never had an LED light bulb fail. I'm still using the same 6-pack I bought over a decade ago, bringing them with me from apartment to apartment. I only have 5 remaining because the glue that holds the glass bulb onto the base eventually failed on one and I couldn't be bothered to figure out what the correct adhesive would be for lightbulbs.

I moved into a house with an obscene number of GU10 LED downlighters. The bulbs were all mid market (I think) brands like Energizer etc. I’d guess they’re coming up to 7-8 years old and I have now had to replace most of them, probably 30-40 bulbs from a couple of manufacturers that all just started to fail over about 12 months.

I also have quite a few Philips Hue bulbs, I’ve had 1 fail out of 20-30 and I think that was not the LED itself but some control board. Some are going on 10 years old.

Fair enough but they don't get hot, nearly any glue would work, Being plastic, I would use CA(superglue).

After failure I like to do a postmortem teardown, it has never been the LED proper, usually it is the capacitor in a capacitance power supply, otherwise the controller IC.