Last year, I had bought a home wired in AL. I I changed the service and added a sub panel upstairs, and installed new copper to the important heavy load areas. Kitchen, Laundry, Bathrooms, completly re-wired a Family Den. I didn't gut the AL 100%. Where I did leave it, was areas with very small loads.
I hate the stuff, but where I did leave it, I was like a Doctor, checking every Box, and installed switches and outlets designed for CU/Al. I might add the AFCI breakers to the AL I had to leave, for extra protection. House was built in 1974.
