I seem to recall that out of the gate it wasn't even going to support all the released material, and from personal experience they have been sloooooow in the past to add that kind of thing. And then you have to pay for it. This is in regards to new books, IIRC they do update errata for free (hahahaha assuming there was a source for it).
Sure, they are a business, and I have a choice as a consumer. So the notepad, pencil, and calculator as always available choices as well.