I think since the web is known for inventing new meanings for old items we are used to, we should accept the skeuophonic meanings to existing real world items, menus, breadcrumbs et al. and even try to invent new ones.
If as humans we learn from existing concepts hence skeuomorphism - our new concepts would mostly be analogical to existing ones?
I don't see a problem with this, it's like storing new information by difference with old information. "This is a walkman, it is the same thing as a stereo, but it is small and portable and designed for a single user." If you know what a stereo is, you're 90% of the way towards understanding a walkman.