Scheduled ops at Salerno have come and gone over the years although mostly by little known airlines. It is geographically closer to a lot of the notable Amalfi coast destinations but the journey is longer than to NAP because you have to navigate the world famous spectacular Amalfi Drive. I would suggest it has some limited potential for low-frequency domestic routes to bring people to Salerno itself and the beaches to the south but it’s never going to replace NAP.