Its not just that each new "feature" is unnecessarily difficult to disable, and already active-with-privacy-side-effect by the time you notice.

Most new "features" are by now covered by an existing setting and/or policy. Yet I recognize a pattern of introducing new "but did you opt out of THIS NEW thing?" or "but did you opt out of VERSION TWO of this previously rejected thing?" setting/policy. It has become unsafe to upgrade to new Firefox releases, because each one will disrespect previous user choice in another unexpected way.