A lot of books and blog posts I've read, including Guitars for Dummies, The Rough Guide to Guitar, and this Stack Exchange question, encourage or expect me to have different guitars with different tunings.
I'm confused about the practicality of doing this rather than just re-tuning a single guitar. I'm sure it's slightly more convenient to always have a guitar in a specific tuning, but with a good tuner switching between different tunings should only take half a minute at most. This doesn't seem like a problem that's worth throwing thousands of dollars into fixing.
Coming from the other side of things, if you collect guitars for their different sounds or quality or etc, it feels like a waste to damn a single unique-sounding guitar to always be a single key rather than adapt it to wherever you want your piece to be. So having a bunch of guitars and assigning them specific tunings doesn't make much sense to me either.
What is the purpose of owning multiple guitars in dedicated tunings?