Although the dust and oil issues popped up on my d600, they lasted about 4k shots.
No first hand knowledge. It's just something I became aware of once I started participating on this forum that the D600 has a reputation for having unreasonably serious problems in this direction. It's difficult to know how widespread it its. Surely,those who've had this problem are going to be much more vocal about their experiences than those who have D600s that don't have this problem. If I were in the market for a camera in that range, this reputation would surely give me pause about buying a D600.
Being old school film photographer, I see the advantages of digital over film, but I can't understand why there are so many digital photographers out there that don't know how to clean their damn camera. Dust, oil and dirt are nothing new in photography. Keeping your gear clean isn't hard, just tedious. Ok, my rant is done.
I was taken by surprise when I discovered the sensor-dust issue with my D3200. You're right, it's not that difficult to deal with, once you figure out what you're doing, but it is an issue that doesn't arise to nearly the same degree with film cameras, and I'm sure I'm not the first, on making the transition to one's first DSLR after many, many years with film cameras, to be caught to such a startling and disturbing degree by this issue.
With my F2, I always knew of the importance of keeping it clean inside and out. But a stray bit of dust here and there was never a big issue. If a bit of dust happened to land on the film, it would affect only that one shot, and by the next shot, it'd be gone. In a DSLR, if a bit of dust lands on the sensor, it stays there. And as another bit of dust, and another, and another, you have a growing problem. I'm sure that for many photographers, making the transition from film to digital, it's just not an issue that one thinks to anticipate, until one actually experiences it.