VW is a far larger company, including when it comes to sales networks, distribution networks, and manufacturing. If there is any scenario - looking out a decade or so - where they don't always outsell Tesla in EVs, it means a horrible disaster has befallen VW as an operating business.

Given the size of the global automotive industry and the major players, most of them will end up outselling Tesla in EVs. It's an inevitability. And it says nothing inherently about who the best EV makers are (that goes for Tesla as well). Plenty of mediocre vehicles get sold in volume every year (just look at the garbage sedans GM and Ford produced for a couple of decades).

Tesla has already said it will open the Supercharger network. VW's network (Electrify America/Ionity) has always been open.

Yes I meant more like e.g. a VW charging flatrate that also applies when using Teslas network as a VW owner. In any case this is pure speculation.