You know what people really hate? Change. Ask around how many people like it when Facebook changes its UI. Most don't. Sure, if there's a bug people hate living with the bug, but people really hate change even more.
I agree with you that this is a very strong sentiment. People don't want everything to change all the time underneath them, especially not the UI.
But freezing everything for years puts too many people in a situation where they just have to upgrade for one reason or another. It's not always their choice and it's rarely a desire for change that makes them do it.
