What were dealing with right now is that our clients have upgraded and send us Adobe CC files.
CC files don't always open properly in previous versions, even CS6.
It's a little annoying to have to call your clients and say, "could you save that down to CS6" (Basically, I don't want to upgrade even though it's my industry).
Apart from this I agree with the hard copies.
This brings up another tangent. I totally agree with the the idea of pay once and owning the product. But as far as CC files not opening properly in earlier versions, I have to ask why you are having issues. The only reason why a CC file would not open properly in CSX is if there is some crazy plugin or fancy gradient transparent glittery effect that must remain editable on your end. Out side of fonts what else would you need? Your client should bbe sending you files with all the fancy schmancy stuff flattened any right? Flat tifs/pdfs/jpgs/eps? So no problem.