After using CalyxOS for a while, I came up with a method to use stock android and preserve more of your privacy. https://hackernoon.com/have-your-privacy-cake-on-android-and...
https://grapheneos.org/usage#sandboxed-play-services
An early release of this is already available in the Stable/Beta channel releases. Our hope is that more projects take interest and collaborate on making a much more broadly compatible alternative to microG with the same security sacrifices it makes.