Diane Greene:

G Suite’s Gmail is already not used as input for ads personalization, and Google has decided to follow suit later this year in our free consumer Gmail service. Consumer Gmail content will not be used or scanned for any ads personalization after this change. This decision brings Gmail ads in line with how we personalize ads for other Google products. Ads shown are based on users’ settings. Users can change those settings at any time, including disabling ads personalization. G Suite will continue to be ad free.

This is a great decision. Surprising, but great. It still doesn’t change the fact, that Gmail’s proprietary implementation makes it terrible to use with third-party email clients, but hopefully this is the beginning of a more privacy-focused Google. I doubt this, but I can be hopeful, right?