You say that -- and externally the place looks like a catastrophe -- but we don't know what's going on under the covers. If they saw him as a true risk he'd be gone by now.
Do you really think the Uber board is going to risk bursting that bubble with an IPO? I'd expect them to keep doing funding rounds on the basis of "it's an XX billion dollar company and its valuation is growing at YY billion/year" and try to keep the Ponzi scheme running until they get their self-driving tech working (since that's their only realistic chance of actually becoming revenue-positive).
Sure, they'll keep that going as long as they can. The point is, though, that narrative is slipping away from them. They need to make a convincing case that it's real, and do so soon.
