A Dacia Sandero Stepway (5 seater small SUV/crossover) costs € 13 000 brand new. How much is the cheapest Tesla again?

Apples to oranges if it's not electric

The Chevy Spark EV was supposedly nearly as cheap after rebates, I think. But I believe it was discontinued, and I assume that means it probably was being produced at a loss, so it doesn't really count.

Should have compared it to a Dacia Spring then: 17.500 euro with >200km range.

I believe that is before subsidies and including VAT, so it will be more like € 11 000 after subsidies. The point still stands: there are many other manufacturers with long experience in making cheap cars.

Nothing that Tesla has built is anywhere near the bottom of the industry though.