To me the 20YR warranty was the salient factor that puts Bryston above all others as “Legendary”. Without the 20YR warranty, I just don’t think Bryston will ever be the same.
Even as a dealer (which gets me discounts on Bryston), I would have never even bought my two Bryston 9B-cubed-5Ch amps if Bryston only had a 10YR warranty, which isn’t many more than ATI’s 7YR warranty. The 20YR warranty was what made Bryston legendary to me and it was the salient buying factor to me.