Who didn't have Ekco utensils in their kitchen 40 years ago. Yes they do get dull. And I am surprised yours lasted as long as it has.
When you couldn't afford the more expensive utensil, you bought the Ekco one at Woolworth's. Many years ago I went into a "Kitchen type store". They had those large spoons for stirring the pot with wooden handles and rivets. I bought one. And I still have it along with its mates of egg turner, larger spatula for turning meats, and a restaurant style one. Made by the same company. In fact I have the whole matching set.
Good luck with your new grater.