that's what the stable/experimental channels are for - a user who don't want to be tested on (such as a business user) can easily be sure that they are getting a stable release and their settings won't update under them.

Experimental/beta channels can have these changes pushed to it, since that's implied by the name, and those people who like living on the edge of new features do so knowingly.

Let the users control their destiny, let the users decide when. That's the hallmark of a trustworthy company.

Users who intentionally run beta / nightly are not normal users. How many of them run on cheap "desktop" computers they bought on sale at Target, do you think?