Lush sells cut and weighed soap. The loaf sugar I've not seen in the UK but is still available in Germany. Cut cheese at the deli counter is one of the last items that is still sold to a customer from a larger block.
In the days before sliced bread there was also salt sold in lumps. We're back in the years pre-1930. You sometimes see in antique shops tiny spoons referred to as salt spoons. Not that I've ever questioned why there was ever a need for a salt spoon. Apparently it was for distribution of the broken up lump salt at the dining table.
You can see the irreversible trend since the Hardy Lane store opened in 1929. Provisions, both food and non-food, have become sliced, diced, packaged and ready for use. Who is going to crush salt and pass the spoon these days. It has actually gone beyond that. Today you see chopped vegetables in plastic on sale in the chiller cabinet, and frozen roasted potatoes and the Yorkshire puddings to go with them.