I have iCloud+ on a family plan. Gives me Apple TV, Music, Fitness and 2TB of storage. I use it to back up all my photos (with a process to back them up to my local NAS as well as additional cloud storage - AWS Glacier)
I'm on a Mac all day and have an iPhone and iPad, so it works for me.
Some alternatives might be cheaper, but the integrations are too good to pass up.
I've started using iCloud fully since they implemented end-to-end encryption, other than that I wouldn't recommend keeping any (sensitive) data in the cloud if it's not E2EE
I use my personal Dropbox account, but I also get free 5TB with Onedrive through work, and I'm paying a significant amount yearly ($180?) for 2TB through Dropbox. It may be time to switch, they aren't so different I feel that the price is worth it to stick with Dropbox anymore.
