I see, as far as I know that is not possible with Tesla rental in the UK (where my experience was). This is nice, but does it work with non-Superchargers? I wouldn't want to be tied down to one provider on vacation. Superchargers are rare in some countries.

The article is about Hertz renting out Teslas in the US. That's what I was talking about, and that's what I thought you were talking about because you didn't mention that your experience was based on renting a different brand of EV in a different country.

Teslas work fine with 3rd party chargers. It's just that (as you noticed with your Polestar rental) 3rd party chargers are inconvenient and tend to be poorly maintained.