I am also supposed to be on a low salt diet. It is true that you can lose the taste or desire for salty things if you avoid it, and the diet sheet I got suggested adding herbs to replace some of the flavour. Bring back the unsalted crisps with the optional wee twist of salt to add or not. (You can still get them, but not often seen!)
But if you start reading all the ingredient labels in ready prepared foods it can be something of a shocker. Just as an example: 2 tins of tomatoes in our cupboard, and one had 10 x the amount of salt in it compared with the other!