The short version
Assistant answers in the region are getting shorter and citing fewer sources, which raises the cost of not being one of them. The set of brands quoted for a given commercial question is small and slow to change, so being early to a topic still matters more than being loudest.
What we would do this quarter
Pick the ten commercial questions your buyers actually ask, check what the assistants currently say, and fix the pages that should be cited and are not. Then go earn mentions on those exact topics. Ten questions done properly beats a hundred tracked passively.