I live in the Netherlands and these are too fast for bicycle paths and too unsafe for regular roads. Love the idea, but we would need much cheaper mass production and a completely different road infrastructure.
I used to live in NL, so I know the paths you mean, and the same applies here in Switzerland. But in Switzerland they instead plate them as cars and drive them on regular roads, keeping up/competing with automobile traffic. These are not uncommon here despite their cost and moderate practicality, probably because their cost relative to salary is lower than elsewhere in Europe.
I live in the Netherlands and these are too fast for bicycle paths and too unsafe for regular roads. Love the idea, but we would need much cheaper mass production and a completely different road infrastructure.