Side question - won't it be more profitable to sell some and keep some for potential future profits, so the overall risk is lower but you still profit potentially?
So, rather than gamble, I did what I felt was prudent and sold all my stock. I've got plenty tied up in the well-being of the company already, from my unvested stock to my future career trajectory. Even the value of the real estate I own could rise or fall with the fortunes of my employer. I don't need my fate any more tied to or correlated with the company than it already is.
Selling all your stock comp immediately is more about diversification of risk.
If rsus are a nontrivial aspect of your comp, then you're already extremely exposed to risk in your company's stock price stock price (if it tanks take a big pay cut and they might even lose their job).