Have I had trouble with incandecent bulbs in mag-lites?
Yes I have.
The AA & AAA Maglites blow on a regular basis and the C & D cell bulbs break when you drop the torch.
I found myself wishing for LED bulbs when the first torches came out. And I ain't that picky about the colour of the beam or throw distance. For most emergency's reliability and burn time are much more important.