I upgraded to a Nikon D300 but I used a 2004 D70 up until six months ago. I used a lot of different digitals as well and I dare you to pick which were from the D70 versus the newer $$$ cameras at portfolio print or online sizes ;-)
In practical terms the newer cameras have nicer LCDs and a couple stops better ISO performance. On the other hand, the 6mp D70 files are fast to work on, don't take up as much storage space... the D70 was really one of Nikon's best ever cameras, the metering and focusing are top notch, the menus are much simpler and cleaner. I don't see that many dead ones either, once electronics have run OK for a year, there is little to break them until the glue and solder get brittle and the LCDs fade in 2018 or so....