There are always exceptions to the rule. Most of these principles from a Judeo-Christian framework. When overwhelmed by complexity or difficulty, people look for something greater than themselves for help. If you tell them the new version is faster, it isn't enough faster. If you tell them it's slower, they'll claim it's slower forever, no matter how much faster it actually is.
Few people are prepared to admit they made a mistake.
Most people assume that if they encounter a problem, it is someone else's fault. When pressed, many people will attempt to blame someone else. Users will assume their program stopped running because someone change the system. Software vendors will blame the hardware manufactures. Third party peripheral vendors will be blamed by your primary vendor for all evils.