Almost all of the chargers around Europe are already non-Tesla. They aren't yet super, but upgrading should be cheaper than new installs.

The best situation would be if Ionity and Tesla can agree to merge, or share standards so everyone can charge at all of them. But I imagine Tesla will not be interested until Ionity has parity, or nearly so, with them.

Ionity does not follow their own personal standards. It is the CCS standard. Tesla is the outlier who went with its own proprietary standard. And a post builtout agreement is not going to change hardware connectors on a car.

My understanding is that Tesla wanted to use a standard for their build out but the standards committee dragged their feet in order to stall them. In Europe they do use a standard plug.

just need adapters.

Yep -- Tesla already shipped a Chademo adapter.

Where will TSLA be in 2020 though? Will all of that construction really be done in Europe by 2020? It’s definitely possible but it seems improbable.

Well they just opened the first 350kw one in denmark and there are two more that will open soon. The first electric car cabable of taking 350kw will first come late next year. [0]

[0]: https://www.dr.dk/nyheder/regionale/syd/europas-foerste-supe... In Danish