Personally, the Tesla approach suits much better since I would only use a supercharger if I cannot make it to my destination, so I would be low on battery, thus would benefit significantly from more charging in the beginning. Just recharge enough to get to you destination then slow charge there.

I do the same for trips longer than 400km or if I like to speed. Typically this means a 10-15min break @110kW at a SUC. The only difference is in situations where there is no convenient destination charger or I don't know if it will work. In such cases I'll charge enough to get in and out of my destination. 

The only group this would benefit is the one that cannot charge at home or at their destination, clearly that’s the minority.

Traveling with the family usually requires longer brakes; so that could be a plus for the Audis (I read somewhere that they use a different type of cell chemistry that allows for longer high power charging).

Agree, that miles/km would have been a smarter choice for the x-axis