Just to let you know: I just installed a fresh 6.6.3 and from the Cornerstone settings it says, that Shortcode Storage is activated. But the Docs state that from 6.6.0+ the HTML Storage should be active per default.
This is what Charlie said:
I had a bad version in the docs. But yes it’ll most likely be the default in 6.7.0+. Just so we can have a fallback version to run. Have a great day.