Double RA fault on a A330 a while back and the autothrust locked at the thrust setting the engines were at the time. From memory it was MAS arriving into Melbourne. What kind of a system would allow RA failure to retard the engines to idle, that sounds unwise to me. Though I agree even the newest 737 is 3 or 4 decades older technology than the Airbus.
Pity it wasn't a 320, alpha floor would have saved lives.