What auto dealerships are trying to avoid is the same goddamn thing that happened to bookstores, music shops and video rental shops.
They don't actually deserve to do that. Their first function is to overcharge you as much as possible for a commodity product that is available from many different sources. Their second function is to try to milk you for service revenues. Typically, dealerships depend on service for a significant portion of their income and automakers depend on parts sold to those dealership for a significant portion of theirs. The parts themselves are grossly overmarked and a tidy profit can be made selling them at 60% or less of the list price in most cases, especially from everyone but the base Japanese brands.* The Germans exemplify this but Ford and Chevy are right up there. If you manage to locate a scrupulous dealership you can actually get the parts at reasonable prices — which, of course, the internet has already enabled. The hilarious thing, though, is that the really good prices on many of these parts actually come from dealerships. This is notably true in the Audi parts market. Audi Marin? Evil right down to their black little hearts. Won't work with you at all on parts pricing. But I can go to any of several sites online and get a nice quote from a dealership that has precisely what I need for somewhere half to two-thirds the price they want around here. On the other hand, back when I was buying Nissan parts, my local dealership would give me parts at reasonable prices. And back when I had a local Ford dealership, they would also modify the ridiculous Ford list prices down to something sane and based on their cost for me. Obviously, I buy my Mercedes parts on eBay.
So basically, given that the dealership's job is usually to fuck you over, why in shit would I give one tenth of one fuck about them today? The ones that are worth a crap will continue to exist, because they already fulfill a valuable function. The ones that don't won't be missed. Am I supposed to care about the jobs? Because I assure you that those people don't give a shit about IT jobs lost to outsourcing — another part of a natural process which I call progress. And I say this as an on-again, off-again IT professional.
* And maybe the Koreans, I haven't dealt with them yet.