I've been thinking for some time that it wouldn't be too hard to create a third-party browser extension to crowdsource detection of channels that use primarily AI-generated content (for example, the AI slop music channels that put out multiple hour+ long genre or cover "playlists") and hide them from suggestions or home feeds.

My guess is that Google sees some kind of trend in a contingent of users preferring non-AI content and that surfacing AI content misleadingly has a negative effect on retention / watch time, and/or they're trying to get ahead of long-standing creators taking issue with the platform surfacing AI content disproportionately on account of it being excessively easier to upload in large quantities.