In tech, like in many other industries, people need to make trade-offs. Apple chose to curate as much as possible, and they are mostly doing a good job – why else would their devices be such a runaway success? And yes, it is certainly a slippery slope giving so-called power users more choices. But I don’t think the need to curate should be detrimental to good practice, in this case a backup solution should never force a user down a single path, the way Time Capsule is doing it here.