In my opinion, comparing EA with ISI is pointless for several reasons, for istance becouse the different market nichle of the two companies.
ReadMe.chm, chapter What's new in v1150Where can I find an info that it is not official supported feature. It has been implemented in rf 1.150 and fixed partially in 1.250. There is a note that there are still issues but no one say that is not supported feature
<<<Fixed some issues with driver swapping, although feature is NOT fully implemented or tested, and there are several known problems. >>>
Not fully implemented = not officially supported