There was another company that's been playing around with the idea of chainless series hybrid bicycles for a few years called bike2.dk (an older video: https://

There was another company that's been playing around with the idea of chainless series hybrid bicycles for a few years called bike2.dk (an older video: https://www.youtube.com/watch?v=4JKOKpg21dQ https://www.youtube.com/watch?v=4JKOKpg21dQ ) - they seemingly haven't shipped a product yet five years later. Beyond that think there's also been experimental covered 'human-powered' vehicles done similarly. It may work for some specific commuter usecases but have had a hard time being convinced it replaces a typical consumer e-bike - they assume it's been initially charged. The interesting part though is the possible component/maintenance reduction if things like regen braking really works or there's more ergonomic/accessible/multi-person form-factors introduced.