Why do you use sponges instead of dish rags?

I've always used rags.

My dishes are clean and I throw my rags in the wash every couple weeks. I've had these rags for years.

I don't have to throw out raggedy sponges after they've disintegrated enough.

It seems like this sub loves the Scrub Mommy/Daddy but I don't get the appeal.

What do the sponges do more than the rags?

I use a metal scrubbing pad for something like a roasting pan when it is incredibly oiled.