> Given the widespread unethical (and probably criminal) activity that was conducted at the highest levels of the company I would say there are even odds that there are some big skeletons in the closet that opening the books would reveal and that is why they have stayed private so long.

I don't think this can be understated. In the social and political climate of today, it would be hard (I think) for Uber to have a banner IPO. When you look at where we are, with sexual misconduct headlining the nightly news, I feel like Uber would generally like to avoid public scrutiny until the issue is not as hot.