I don’t quite follow how this is different. When I got rsu’s at my former company they sold a bunch at every vest date to pay for taxes. Isn’t that the same as what they’re talking about here?
Was your company publicly traded? The OP is referring to issues when the stock is illiquid.
RSUs are a little different: they're currently taxed on delivery, not vest. When you work for a public company, vest and delivery dates are nearly always the same, so it seems like they're being taxed at vest time.