I use ProtonMail, and I was thinking, “Damn, it’s spectacular not being tracked… but hold on a minute. Perhaps less than gmail, but still at all. And what about browser fingerprinting, and cookies, and even fonts!” I ended up in that feedback loop we all end up in. Perhaps ignorance is bliss? What is something you (might) wish you were ignorant of?
What others said. Additionally Google offers free fonts to embed in websites that allow Google to know when you visit any site that uses one.