kklosson If you try buy a new license right now from the member login you only have the option to buy 10 (which only gives errors as it is not out yet), my existing v9 is considered legacy. I do not see any options for updating those legacy v9 licenses to v9.x so not sure how the updates will work for the interim releases.
IMO it is odd to remove all options to buy 9.0, probably except emailing and asking to buy, when 10 is not available yet and no timeframe for it was provided.