Because people are habitual, and mental load increases when you have to learn the UI again every update. Like if someone decided to change all your pots and pans every few months, it's harzadous for cooking.
For the same reason you can keep the interior design of your house the same for decades. Also, why not? It should just be a UI theme, decoupled from actual functionality.
You asked why someone wouldn't want automatic updates. I think my answer is clear.
Now you're talking about crime. I have little respect for judging morals through legality -- laws are political and fickle. Morality is more enduring.
In this case, the morals are that buying something is about control, including choosing when and how to use it, as well as when and how it is modified. You wouldn't want your dishwasher suddenly losing capability because the manufacturer decided to remove a feature.
I'm very confused about why you wanted to bring legal issues into this.
I don’t think enough people appreciate this point. Elderly people can do extremely technical things. Once they learn the user interface. At this point, even someone who is 80 or 90 years old has been potentially using computers for 50 years. They understand the technical concepts, but changing the user interface is really frustrating.
None of the above! I don't understand why it's obvious that I should be able to tell the software maker how to make their software (don't change the UI, give me option to use old UI) but that it's not obvious that the software maker lacks a similar right to tell me use the new UI.
Why?