Look at things this way for a moment. Decades ago DJ had many successful careers using what was then top line, state of the art equipment. They made money back then just as they make money today. This amp in question being talked about I am sure, is far advanced than any of those amps used back then. If that is the case, what makes one think that that this amp would not perform its job to satisfaction.
I will give another example using Behringer as a brand. There are some products that they make, particularly their mixers, that are on par with lots of the big brand names out there. The main noticeable difference is the lower price. I bought a Behringer VMX 1000 Mixer back in (I believe 2002) that is still in use to this day. I have known many people who have bought Denon and Pioneer mixers and a Rane, yes a Rane, after mine, that broke down and needed repair. Maybe I was lucky and the Rane, Denon, Pioneer owner was lucky, who knows!
Point of the matter is that certain products by certain manufacturers may do better from Model to model and brand to brand but how you treat your gear plays a big role in its longevity.