Good lord, Grandmamaoftwo, wonder how I totally forgot the salt block of my childhood! I was allowed to use a big blunt knife to break it up and put it into a crock by the cooker.
We use loads of spices and flavours and herbs etc., now in our cooking and very little salt, (sea salt now), but loads of black pepper. We have unsalted butter always and I now couldn't eat the wonderful Welsh and Breton butter which I always loved many years ago - it's obviously just something that your palate gets used to. Salt is no longer the flavouring which was so important in previous generations when there would have been little knowledge about the possible health issues. I'd agree that automatically seasoning food on a plate without trying it first, is just a bad habit - and a crazy thing to do eating away from home - too much seasoning could immediately ruin a meal!
It's true that the sense of taste does fade with advancing years - I saw that when preparing meals for my own Mum : at 103 she was no longer able to appreciate anything with a subtle flavour.
We do have to increase our salt intake in the summer though, because of the heat and loss of salts which can make one feel very peculiar!