Why is RECOMMENDED_MACOSX_DEPLOYMENT_TARGET macOS 10.14.6?

When Xcode shows a warning to update the project settings, it wants to set the deployment target of every target to RECOMMENDED_MACOSX_DEPLOYMENT_TARGET, which seems to be 10.14.6. Why is this value recommended, when the minimum supported version ist 10.13, which has just been raised from 10.10 with Xcode 14?

Why is RECOMMENDED_MACOSX_DEPLOYMENT_TARGET macOS 10.14.6?
 
 
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