This is not true at all. It only has to do with if you have "substantial risk of forfeiture". If they are your shares to own forever, the IRS considers receiving them taxable. This is why double trigger RSUs have expiration dates. It's possible they never become liquid. Therefore they're not your property yet. Therefore you don't owe tax until they are. Or they expire worthless someday, and you don't owe anything.
This is not true at all. It only has to do with if you have "substantial risk of forfeiture". If they are your shares to own forever, the IRS considers receiving them taxable. This is why double trigger RSUs have expiration dates. It's possible they never become liquid. Therefore they're not your property yet. Therefore you don't owe tax until they are. Or they expire worthless someday, and you don't owe anything.
> You don't have to pay tax if your RSUs aren't liquid
Sure. You also don’t get to turn them into cash the way shareholders can. Consider that it’s been VCs most vocally singing their praises.