Another relatively new thing today is that these magic docks are being installed at supercharger sites still under construction. Makes you wonder if they will just start including them with all or most new V3 installations.
I suspect they probably will include them with new sites, but I also suspect that Tesla won't install them in locations that already have high-demand for just Tesla. In other words, any place that commonly has waiting lines for charging is unlikely to get Magic Dock, at least until the site is upgraded with more capacity.