The vélib bikes in Paris and their twins in Brussels aren't pretty or light either but they've been successful, at least as long as they're adequately maintained.
Experience there suggests that blog (above) is wrong. Brussels is full of seriously steep hills and they get on fine without e bikes. The biggest problem in both of those cities is finding a working bike available for hire when and where you want one. (There was one less last time I was in Brussels courtesy of the tram lines

). That's not just my experience, it's been a hot issue in the media in both places.