I was a gmail user a few months ago and I switched my entire life over to protonmail because I didn't want to contribute to Google. I would have to say the most frustrating part of the switch is the somewhat perplexed look I get from people when they ask why I don't have gmail, they have to learn to spell proton, fascinating. I would imagine we will see quite a few hit pieces against protonmail in the coming years, and likely other email providers as more and more people make the switch to a service that markets privacy.