The timescales are quite different though. A failing car factory can be propped up by government subsidies for decades; a Juicero will crash and burn in a year

The timescales are quite different though. A failing car factory can be propped up by government subsidies for decades; a Juicero will crash and burn in a year or two. Uber and WeWork are outliers in that they provide what's clearly a useful and novel service, but it's still unclear how profitable they can be.