South Carolina doesn’t border Tennessee, North Carolina does.
Other than that geographical oversight, I tend to agree, so long as you’re at least an hour away from any city and not bordering National Park Service land.
....... and not bordering National Park Service land.
Why?
I’d say that whole area from 3-state point to 3-state point (GA-TN-NC to GA-NC-SC) would be pretty similar. Geographically / topographically similar, populace is similar, etc. The two points are less than 60 miles apart.
Nice area in general. I like Blue Ridge GA, which is ~10 miles south of the W end of that line. It’s a neat town.