I hate to say it, but I think I'm using CS5 (when I actually use it) and couldn't care less (although I despise the pricing model). What actually improves in photoshop that photographers would actually need the latest version?
I can only speak for myself. I've always felt that I was held hostage by Adobe and that I was forced to buy the latest version of PS to get the latest version of ACR. For some long time that was really the only reasonable way to get current RAW converters for a variety of the latest cameras.
Recently that has changed...especially with the poor support that Adobe gave for the Fuji x series raw files...they were one of the last to support them, which has prompted many of us to search around for other raw converters - quite successfully, I might add.
Capture One seems to be the leader of full blown commercial products, but not to my personal taste due to the catalog feature (much like LR).
There are several free raw converts on the web that work well...Raw Converter being the simplest and pretty darn good
🙂 and there are now many free or inexpensive apps that afford quick viewing of files for later editing... Lyn comes to mind for mac users; fastone for windows are great for this. I saw a mention of another raw converter in this forum over the weekend ... Accuraw for mac ($29) where the user believes it is actually BETTER than ACR or some of the other converters.
So, to answer your question...in the past there was a lot, now, not so much...
Good lucky Adobe - in my view you've blown it.
Tom