wisecracker, do you encrypt your macOS hard drives?
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On another note.... finally I got Mojave 10.14.6 upgraded on my MacBook Air.
I'm not sure what the problem was, but my best guess is that is was related to being (previously) a member of the Apple Beta Testers program. Maybe these problems will go away over time since I have un-enrolled as an Apple Developer Beta Tester on all devices?! I don't recall any benefits for being a beta tester anyway
but I have experienced a mountain of macOS crashes over time which I never seem to have before.