I have PhotoShop CS6 on my Windows 7 machine. I would have just migrated that over to a new computer but for this trip. The cloud storage seems attractive - IF I can get the uploads done. NEF images are HUGE!
Thinking back, I have probably averaged at least $120 a year with the various upgrades to PS over the years, so having the cloud storage is sort of an extra. If I hate the subscription plan after I build my new computer, I may try out some of the other photo editing software out there. There was one recommended here in the last couple of weeks that looked good.
If I had been a Lightroom Classic user I would not have worried about no upgrades for RAW until I bought a Nikon D750 for this trip. Now I will need to be up to at least that capability - and I am not sure if my old PS CS6 can handle the RAW images from this camera - actually I think it does because I have downloaded and edited some of them.
Storage is always a problem - on the first trip with a Nikon digital camera I took 1500 photos in a week. Each night I'd stop by the Walmart in Titusville and burn the pictures to CDRs so I could empty my memory card and start over the next day. I don't want to have to carry a loaf of DVDRs on this trip - and optical media is so old school now, LOL!
My husband got home and he did buy two of the 4 Tb drives, so we will probably use those and see how reliable uploads are in various parts of backwoods Scotland, England, and Wales. We're not spending much time in cities and I don't want to spend all of the week we're in London uploading pics. Maybe I should make a big sign to put on my laptop for the maids - "DO NOT TOUCH!" so I can leave it working while we're checking out the city?
The other part is I need to be able to do basic editing to post pics online and Lightroom should let me do that, no problem.