Copenhagener here. People do use eBikes in Copenhagen, but I guess it depends on what you consider “very few”. My guesstimate would be that around one in five bikes is electric. As to why not more bikes are electric, Copenhagen - and Denmark in general - is very flat, so eBikes are more so used for:

• long distances (say, people who live ~20 km from work but still want to bike there)
• cargo/passenger bikes
• letting people bike who otherwise wouldn’t physically be able to

Like this?

Back in your own discomfort zone

It’s way too cramped and crowded

There’s an open gate to a clearer place

Not so overclouded

But i truly fear that you’re going clear

Somewhere in the distance

And my heart will break, if you’re gonna take

The path of least existence

• Amelia Part 2 by Dizzy Mizz Lizzy