Is installation of new Xcode Additional Tools irreversible?

I am a confused about this.


I installed Xcode 10.2 beta 1, alongside the existing installation of Xcode 10.1, as well as the Additional Tools when prompted as part of launching Xcode for the first time.


As a result, `xcrun simctl list devices --json` output[1] appears not to be backwards compatible with Xcode 10.1 [2].


Explicitly setting the Xcode installation using `xcode-select -s` to Xcode 10.1 doesn't seem to change the output.

Removing Xcode 10.2 beta 1 from /Applications doesn't seem to change the output.


What do I get wrong about this? Thanks.


[1]: More specifically, the JSON "devices"

object is missing entries of "iOS 12.1", etc. that identify devices given the platform

[2]: It could be a regression. I am not sure at this point.