2001 I replaced Head lights about every 2-3 yrs. Get a pair of thin cotton gloves use them when unpackaging the bulb and while installing. Any oil on the bulb from your hands will impact its life. Also when I was spending lots of time on logging roads doing Mt bike trips etc - the bulbs had a much shorter life. The hotter brighter burning bulbs had shorter life than the cooler bulbs which were not super bright especially when running on the logging roads. Hot bulbs vs rough roads generally results in a very short life span.
A good year after I installed my 9011s, I'm convinced it was the right way to go. As more and more stock vehicles come with HIDs, and more and more people put in junky retrofits and overdriven 'blue' wannabe HID lights, the more I hate them. I've seen very few that don't irritate me. Exceptionally bright conventional truly white bulbs bother me less. The mod to make the 9011s fit is really dead easy. Because the fog lights on our 2nd Gen. cars are really 9006 high beam bulbs, I'm going to get 9012s for those.
Another thought on headlights - I know more light is always better for you to see with, but in consideration of how they are used, I will NOT 'upgrade' the low beams to be any brighter than the original, stock bulbs. As long as they are the correct color temperature (which btw, all this 'Kelvin' business isn't actually about how bright the bulb actually is), I'm not going to up the lumens/candlepower. Why not? Consider when you use your low beams vs high beams. If someone is in front of me coming toward me or leading the way, I shouldn't have my high beams on. I don't need to add brightness for 'my benefit' at the expense of the other driver. I certainly don't think I want to blind the guy coming at me at about the same speed as I'm going. My brights are for when I have no such issues - so that's where I'm throwing my extra illumination.
It only takes abount 5 minutes to change both headlight bulbs. I have a 2003 outback and use Narva +50 which last me about a year. Twist off the large cover that protects the bulb conections, release the locking wire that holds the bulb in the socket, unplug bulb. Plug in new bulb, insert in socket, attach locking wire, twist large cover back on. Thats it, I don't disconnect anything else or touch anything else. 5 minutes. I don't understand the so called problem changing headlight bulbs.