With HDV being the future, saving wear and tear on them means they will have a longer production cycle (hopefully) in the HD era...
Interesting point, but I have a hard time shooting anything in SD after seeing what HDV has to offer. Not only do I get to build up my HD demo library, but I can offer better widescreen output and have more flexibility in terms of cropping/zooming shots during editing. Nah, there's really not much point in keeping the DV cameras now, other than as playback decks for old DV tapes.