Is that the light bulb that has had three new filaments, two blulbs, four new bases and 10 new vacuums? But has lasted that long - or is it that it takes no number of Californians to change a light bulb? Because like Arnie they are tough and not afraid of the dark, but he will be back to do the job.
Oh and my point about voids and crystals is that once a localised spot goes a little higher resistance - it gets hotter. Evapouration is surface (plenty of that with coiled coil) and continuous, crystalisation/voids goes right the way through and is worse at switch-on. But it all conspires. Vehicle bulbs are usually single coil (thicker wire) because of the vibration.