It isn't that they can't, it is that they should expect some attrition. They should also, hopefully, elicit feedback and if enough people feel a certain way, adjust their design. I think it is pretty common a reasonable for people to feel a little put out when they realize the thing they have loved is changing in a way that makes it not that thing anymore. it doesn't mean that person is demanding anything. It's just an expression of grief or frustration or disappointment.What is the answer? I mean, if they cant do revisions and updates after a decade when can they?