>I was reading in the D600 forum how someone feels that it >makes the D300(s) only fit for "hammering in nails",
Hammers are for hammering nails. Cameras are for capturing images.
>and how we users ahould not cling to outdated tech because of >our "need" for the semi-pro appearance.
I am not sure how to respond. If one is comparing the build quality, ergonomics, and control layout of the D100, D200, and D300 series bodies to the D7000/ D600 bodies, in reality they are minimal. I suspect that the vast majority of the population couldn't tell the difference between a D300 and D7000 or even a D4 and a D50 for that matter which in MHO makes this point moot.
>Does anyone agree that this new model suddenly makes all our >"old" cameras take bad images?
Not at all! Old Camera bodies (as long as they are in working order) remain as capable today as when they were brand new and state of the art regardless of the advances in technology over time. Each generation of DSLR's has improved capability over the previous generation even the first generation bodies are no less or no more than when they were new.
While the latest bodies have improved high ISO performance, more resolution, and dynamic range which are compelling reasons to upgrade. More so if you shoot low light sports or print very large or even have a bad case of NAS. The fact remains that the pevious generations of bodies continue to provide outstanding images and will continue to do so as long as they continue to be used.
I for one continue to use my D200 and D2X and even my D70s on occasion along side and sometimes instead of my newer bodies. Good Luck and Enjoy your Nikons!