And I personally can understand why that is since I came to the same conclusion. The price difference when buying a complete new system is not that big and at that point I figured that I'm much better off with the full frame 5DII since that is what I really wanted to begin with. The 7D in a way is really a specialty camera for wild for instance.
I think you would be very surprised how many 5DII owners have 7Ds as well.
The cost of the 5DII is not just the body - but the lens as well. I have a 400f/2.8 IS which is a terrific super tele on the 7D. What lens for the 5DII would you suggest would match that?
Take my 70-200 f/2.8 - on the 5DII the nearest is the 70-300L - not really a match.
Move down to the 135F2 and 85 f1.2 and do the same comparison.
The 5D2 is a great camera - providing you can get the lens, the fps and the AF to match the subjects you take.
The 7D is the top of the NON specialist bodies.
Well, again, there are different approaches to this and for some people, like yourself, this is a great match. All I was trying to say is that Canon obviously did not sell such a great many of 7Ds as they might have hoped for.
And I would think that for more users your usage and use of lenses does not work that way. If you need long reach I get how you like that the 400 is even longer. And that's about it. For everything else I specifically did NOT want a crop sensor because I like it that 24mm is in fact 24mm. And that my beloved 50 is indeed exactly that. Same with the 135, which for my intentions would become rather useless given how those gems have been used for decades. And for everything else I have my fast 200 which is about the longest I have any use for under normal circumstances - and as a 320mm would become rather problematic and require a tripod. I can still always crop later if I feel like it.
For me the math on the two bodies plus one lens to start with was: 5DII kit with the 24-105 = around $3200 (Nov 2010 after discount at local dealer). 7D + 24-70 2.8L = around $3000 as separate items. That would have been roughly equivalent to achieve similarly shallow DOF (which is important to me). That plus the need to then purchase a super wide angle lens and only very expensive options to get to a fast 50mm range would have made the endeavor more expensive and likely may have entailed some buyer's remorse in the end.
That being said: I could totally see adding a 7D as a second body at some point. It is in fact a great alternative to a teleconverter in that sense. Or I may be packing away a second 5DII at a good price point once we know where the 5DIII (or whatever) is headed.
I think we have to slowly come to the conclusion that the folks who kept predicting the end of "full frame" were maybe not right. Canon seemed to just have eliminated the old compromise of the 1.3x sensor which only ever existed because of technical limitations. The 5DII remains one of the biggest hits in Canon's history. And most people who buy cropped sensor do so because the are on a budget and buy Rebel kits. Yes, there are one or two very good EF-S lenses now, but in general the pro lens line up remained geared towards the 35mm format. I don't see any indications that this will change.
My prediction: the 7D will go away. The 60D will go away. APS-H sensors will go away. Cropped sensors will be strictly for the budget line. Canon will close the gap with one or two full frame cameras, one of which will be sort of a replacement of the 5DII (but may be a little disappointing featurewise to current users).