My answer to that is fairly straightforward: None should be exempt.
There's no policy reason for the Copyright Act to be industry-specific for certain types of exceptions or limitations. There's no real justification for why that should be the case. Industry groups may come to you and say, “It's already been solved by an independent agreement” or “It shouldn't apply to our industry, because it will produce certain disadvantages in competition.” Again, however, it's not the role of copyright policy to discriminate among the interests of different industries. The copyright law, in fact, should be operating agnostic to these types of concerns. I suggest the same approach should be taken here.