Tax on the graphics industry, in our case at least.
We run a corel shop for all our vector artwork (99% of our artwork is vector), and there are plenty of alternatives for editing raster images (particularly if you're sent RGB artwork, in-which case we pretty much couldn't give a fuck about colour fidelity)
But you will get the odd punter who insists on sending you either Adobe illustrator or InDesign artwork, and for whatever reason isn't forthcoming with PDF's / EPS or anything else that could be considered an industry standard. We are basically going to have to shell out for a single seat licence for the sole purpose of accessing awkward punters artwork.
Buying boxed copies was never much fun, but at least you owned something that retained some value, and could be had reasonably cheap if one shopped around. Now we will be paying an adobe tax just for access to a select few of their file formats (the ones we don't like) while their other formats (PDF EPS PS etc) are already integrated into everything we use.