[stereo]

Paris is a lot flatter than Aarhus, which has much higher bicycle usage. And if you need to go to Montmartre, any Decathlon in Paris sells perfectly decent e-bikes for a few hundred Euros. It's infrastructure, not culture or hills or weather.

[petre]

Yup, it is infrastructure. All those quaint cubic rock paved hilly streets in Montmartre with obstacles tobprevwnt cars parking and and cars parked on the side are a cycling hazard, especially when it rains.