I'd missed that they have started the update. There is a break in the family list between Apodidae (updated) and Eurypygidae (not updated).
Somethings up. The updated families from Struthionidae to Apodidae are no longer available. They link to the old H&M4.1 version.
But I see no update about where or when the new material will be available (presumably behind a paywall).