I don't know where you take you information, I speak french and was watching french TV following Dakar, I've heard of many KTM failures especially one Swiss compatriot
I was following on his race, had a KTM and changed 2 engines he had to abandon the race on day 4 because of motorcycle failure...
But that's more in the non pro racers, which i'd say is even more relevant because we don't buy pro bikes do we !
I've been buying Yamaha, Kawasaki and Honda for the last 10 years and I must agree that the quality has slightly decreased, but the prices have decreased too, so really
can we complain about it, you get what you pay for there's no miracles.