Yes...it makes for a BIG improvement. Every demo I've heard where at Altaira was in the system, folks listened, and then the Altaira(s) were removed, and folks immediately demanded the Altaira be put back into the system.
Mike has also direct experience this phenomenon because he and Richard got exactly the same reaction from folks in the demos they performed at the Florida Int'l Audio Expo in Feb., 2023.
In my experience, everything that can make a proper "chassis ground" (or in the appropriate application, "signal ground") connection to an Altaira hub makes a difference and improvement for the better.
Florian also knows this which is why he installed a properly-deigned ground terminal on his speakers.
Here's one of the two Clarisys rooms at AXPONA last year that used a full Altaira set-up.