I have at least 5. I may be hard-core, but I have one in my travel bag, one at the office, one in my home office, one in my living room, and one in my bedroom.

I have at least 5. I may be hard-core, but I have one in my travel bag, one at the office, one in my home office, one in my living room, and one in my bedroom. Granted, some of these have Magsafe 1 to 2 adapters on them, but those little things are also expensive. At around $600 for the additional sets, plus probably another $300 for other dongles in quite a few locations, I think I will not be upgrading anytime soon.