I don't think it's unreasonable to wonder if your airbags will deploy on a 20 year old vehicle, regardless of the make or model. And while the Prius may be a 5-star crash rated vehicle, there is just something about the build quality of the "prehistoric Japanese automobiles" that is hard to beat. I'm glad to know that the build quality of the SRS system matches the rest of the vehicle.
Run an 80 into a Prius, see who walks away.