They're MUCH more nimble on the street than many streetbikes, and they haul camping gear over rough ground better than most dirtbikes that were designed in the same period. They are some of the most versatile bikes sold in the US. Maybe 10K miles is a lot on something like a KTM 250-500 or LC4, or if you let your bike sit a lot, or run it near the rev limiter or lugging constantly, or take mostly short rides where the bike doesn't fully warm up, or just abusing the hell out of it. These kinds of things are bad for even the best of cars though. 50K+ miles, if regular riding and maintenance is done, is not a rare thing for a DR or KLR. 20K-30K miles on a DR that is taken care of wouldn't spook me in the least. The bike is simple and parts are easy to come by.