In reply to john natschev.

My though is that a new best practices document should be drawn up. 802.1ax comes with a lot of new interesting technologies that change the way we will design wireless network.
Also, regarding the SSID number, we don't face the same issues with management overhead (impacting channel utilization) that we had with legacy 802.11 standards. Data rates are increasing and communications go faster. Nonetheless, I would no recommend to have a large amount of SSID if you don't need so (i.e. degraded user experience)

Very good article by the way!