John Sheehy wrote in post #18142793
If you still use the 7D2 for some things, then maybe you haven't "switched"; you've simply expanded. ...
... I don't see myself as ever "switching" or "going full frame" until a FF camera does every single thing better than the best crop camera available.
Nethawked wrote in post #18142805
Bingo, we have a winner. Different tools, different purposes. It would never have occurred to me to replace the 7D2 that I use for wildlife and some macros with the 5D4, just as I would never take the 7D2 into a dark theater. Nor would I attempt to duplicate the crop factor of a photo from an APS-C sensor with extenders, TCs and crops. I'm grateful to have both, and that's where my story ends.
I have been shooting crop bodies since before Canon made a full frame and never stopped, and expect that I will continue to do so. If the "One Camera to Rule them all" could exist, then I might be happy with one sensor size, but i can't imagine that camera can possibly exist.
Different tools indeed.
That said, I have to disagree at the same time to part of what Nethawked appears to imply. It appears that the discussion took as out of one self imposed box and put us in another.
A body like the 5D4, or the 5D3 before it, and to a lesser extent 7D2 and 1Dx for that matter, all of these bodies are blurring the lines that were far more solid a few years back.
1Dx and 5D3 turned the Canon world on it's head regarding that fact that it's TWO best action oriented camera were for some time, these two full frame offerings.
Today, you can go either way. One absolutely WOULD use a 1Dx2 for wildlife, despite the fact that it's also Canon's BEST body for shooting in dark environments, and pulling shadows. It's Full Frame, but it's the best action camera Canon has. And I can tall you that I absolutely will be using 5D4 for wildlife, it has better AF than the 7D2, and if I do my part, I will get better image quality and more detail.
I think that finding out how a 5D4 image compares to a 7D2 image when distances are at the outside edge of comfort is a perfectly valid discussion, as the 5D4 will be used for those long shots. Heck,, it would be even if it did not have better AF than the 7D2 or the superior implementation of t-cons, just as many used the 5D3 for such work.