I remember the old C10's had problems with cam pitting. Some riders ignored it and rode on for many miles, while some complained and had it fixed and others sold their bikes. Of course it was not something that was as visible as a leak. It was a known issue. Mine had pitted cams.
The ZZR 1200 had the same problems with cam pitting. And some owners had an issue with porous heads. Mine had pitted cams and one of my valve cover sparkplug hole gaskets was misaligned from the factory which resulted in a lot of oil leaking into the air box.
My C14 developed a leaky valve cover gasket at around 11k. I am keeping my fingers crossed on that issue.