Windows loves clean installs. As does OSX, iOS... Computers love clean installs.
I haven't done a clean install of OS X in a decade. I just transferred drive from old computer to new computer when I upgrade machines. I did the same when moving from my Mac Pro 5,1 to a hackintosh. I also did the same on my laptops.
Every time I get a new iPhone, I just restore everything from my previous iPhone.