Why do we care?
Here is why. It seems Microsoft marketing has overwhelmed the target audience with dozens of made to be equally important Azure “services” (for the lack of better word). The “full Monty”: Posters, charts and animations. It is enough for Azure newcomer (developer or decision maker) to make and keep her dizzy, instead of producing focused and relaxed visitor, when entering the Azure yonder.
[Update 2017 May 05 ]
One succinct text on what constitutes good VPN architecture might be found here.