This. If Search + Google Ads is independent from Android + Chrome + Gmail, it will choke the user-data flow that Google Ads platform is feeding on. This opens doors to new competing search engines!
Android + Chrome + Gmail needs to be bundled with hardware purchases, like Apple does with Safari + iCloud. This will create incentive to make them actually privacy focused, and could be its selling point. No need to feed Google Ads with data anymore!
Yeah, dreaming.