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Which actually isn't that kind of a news. Because the first such thing where deployed in Sweden in 2016.[1]

Sweden even has a second prototype project right now, which uses electric rails which can be used by trucks AND cars.[2]

Implemented by Scania (owned by Volkswagen) and Siemens. The same are now the main partners behind the one in Germany.

When did Scania (and Saab presumably) ownership changed?

Saab-Scania (70's-90's) was split into Scania (trucks) and Saab Automobile. Scania maintained independent for a long while but is now owned by VW.

Saab Automobile was bought by GM (90's-2000's), who completely ruined the company, sold it for pennies, and now it's bankrupt.

They date to the early 20th century, ~1918.

It's a sound concept.