But that’s you. I imagine you like having a NAS and spent time playing around with it. I know that’s exactly what I do with my NAS.
I’m talking about simply being able to use the AppleTV as a TM destination (which is something Apple haven’t offered since discontinuing Airport) and a place to store you photo library once it gets big (and they do get big, my photo library is 220 gigs, and that’s just 25 years of personal photos, bit professional work).
For a household with an AppleTV and a couple of MacBooks, say anew and a MBA - a NAS is over complicating something that could be done within existing hardware in the Apple ecosystem, and is also an extra expense. When you factor in the drives, even a budget Nas is a chunk of change for something that people don’t really think about, because when it’s working properly you shouldn’t notice it.
Using iCloud storage as the alternative can because a very expensive subscription over time, adding up the months, once the amount of data grubs larger.