I thought RSUs are only given by public companies. Anyway, they would be crazy not to exercise.
Tough choice to make right when you just lost your job. The tax bill could be tens of thousands of dollars or more.
I don't see it as a tough choice. Airbnb will IPO, it's just a question of when. It's a safe investment to make. This is a company operating all over the world that had $4.3B in revenue last year. If not COVID-19 they would've probably IPO'd very soon. They will get through it.
If you received options at a strike price at the peak valuation, then the current valuation may be below that level.