None of this addresses the main problem: all of Google's apps are so well integrated that I'm locked in. My Google Calendar appointments appear on my Google Ma

None of this addresses the main problem: all of Google's apps are so well integrated that I'm locked in. My Google Calendar appointments appear on my Google Maps the day they're occurring. When I get a flight confirmation in GMail it's added to my Google Calendar. That doesn't work with Fastmail and Open Street Maps.