I don't see why people are upset or surprised about this. Apple is a pioneer in making electronics difficult to open up and play with. It has always been their approach to control every interaction that every customer has with every part of their business and every product produced by it. Accept it or use something else.
upset or surprised suprised maybe not so much, but it seems pretty obvious one would get upset if his/hers go-to device is suddenly rendered practically useless?
I do stand by my assertion that it is legitimate for apple to behave in this way though. They get to present their business as they choose to just like any other company and the customer get to choose whether to accept their terms. Personally I don't but, empirically, most other people seem to.
I would however support requirements (as legislation) that consumers should be made aware of such practices at the point of purchase such that they can factor it into their buying decision.