in the short run this system might make sense for some use cases, the future it is not. chainless systems will take over for e-bikes, e.g. https://www.schaeffler-industrial-drives.com/en/news_media/p... First used here: https://www.golem.de/news/free-drive-schaeffler-baut-kettenl... (german only, sorry). 250W is low, so there needs to happen some development for more use case.