I am new to the topic, so I can't really contribute. But I love to see other people help the boycott.
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Switched to Vivaldi. Awesome browser on all plattforms IMO.
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Switched to Proton Mail, and feel good about it. Why is Proton bad?
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And Big Win: I now host my own Nextcloud, Kalender and paperless-ngx. Highly recommend these, from a usability point of view. Can't say much about the technical or security perspective.