I ditched Google Calendar for Proton Calendar, and that was a mistake

I'm a long time Google Calendar user, but the promise of Proton Calendar's privacy and security is alluring. But, is it any good?
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Alert for Gmail users: Disable this Google Calendar setting immediately, or you'll be at risk.

A flaw in Google Calendar linked to Gmail's default settings could put your personal information at risk. Learn how to protect yourself from this cyberattack. 2.5 billion Gmail users are facing a ...