With a chain case that fully encloses the chain to keep it clean together with an oil bath to keep it lubed, a conventional bicycle chain can last almost foreve

With a chain case that fully encloses the chain to keep it clean together with an oil bath to keep it lubed, a conventional bicycle chain can last almost forever. But as it's been done in the past, this approach adds quite a bit of weight and makes getting off the rear wheel to repair flats and replace tires much harder. If there's a way to keep the good parts of this and address the shortcomings, it would be real progress.