I thought the commentary was rather flat and stilted. Yep, the Chinese have used it too although both seem to have allowed more room between the stages, I wonder of SpaceX have been a little too clever. The next versions will have an angled lattice instead of the current straight version which will not detach from the booster i.e. no hot staging ring to discard.
The next flight could be less than a month away, we live in magical times.