Google hides your emails if you don't accept their AI to be trained on

From the forum discussion on https://news.ycombinator.com/item?id=46744807 :

The promotions/updates/forums/etc classification [...] has been “down” [...] ever since Google tied this functionality to the same toggle that opts you in for using your email data for AI training. So now you can’t filter this stuff without also agreeing to a whole swath of unrelated and opt-ins.