>Are there any relatively common tasks that will actually be prevented by this level of ghosting? I don't mean "it's a bit annoying", I mean "this task is no longer feasible".

Apple bills their computers as "the computers you do stuff with". They have a long history in the professional media/content creation business, and their marketing campaigns and advertizements for the last several years were based on bringing those capabilities to the mainstream.

If nothing else, iPhoto, iMovie, and GarageBand come with every Mac.

With those issues, two of the potential uses for the computer–which comes bundled with Apple software to do them–become infeasible for anyone who cares if they exist at all.