Airbags are expensive, dangerous, and useless to a good defensive driver. The only "goodness" are all the people making big $$$ off of their mandatory sales.
And...if you have an airbag, "they" say it's dangerous to drive with your hands in the 10-2 position (like a lot of us were taught is the best position). In that position, you're almost guaranteed a broken arm if the airbag goes off. The new recommendation is no higher than 9-3.
Source of that was in an AAA rag a bunch of years ago.