My Boxster is now 11 years old, and I'm beginning to think about what kinds of things are going to fail in the coming years--this isn't a complaint thread--I just recognize that electrical components fail with time and heavy use, like the headlight switch and the ignition switch.
How about the top switch? That's getting pretty heavy use. Have many people had to replace these? I was thinking about actually carrying a spare on-board. It's easy enough to replace on the road.
Other than fuses, of course, what other kinds of electrical spares are people carrying?