"In my opinion: They are all teetering on the edge of extinction if (or when) Uber has to do the near unconscionable act and hit the button and launch – a down round." is everything wrong with the VC funding mentality.
Surely it would take the sheen off what has been a meteoric rise, but the hype cycle will continue to turn. Hopefully they can figure out the multitude of cultural problems if there is a harder reset.