Earlier quoted context omitted.
ProtonMail has come a long way as a replacement for Gmail as well. Suuuper happy with them, they're really responsive to feature requests and support inquiries. I requested for an iOS feature to choose browsers so I could open all links from PM in Firefox. They had it implemented in a month or something... it a quick fix but that impressed me. hence me shilling here They recently added ProtonCalendar too.
Switching email isn't nearly as friction-free as switching your browser. Not only do you have to change your email in every service you've registered for, you also need to convince your friends and other contacts to use the new email.
1: Start up new email (for me it was Fastmail) and preferably get your own domain
2: Forward all mail from gmail to your new account
3: Create a rule that flags messages that are still delivered to gmail, go through them at your leisure and swap to the new address