And I know hardly anyone who buys petrol by the litre (though we all used to buy it by the gallon). We buy it by the pound (sterling) because most of us haven't a clue what a litre is.
No, the reason for this is the price of petrol fluctuates rapidly, and that a litre of petrol (and a gallon!) usually is a fraction of a penny so it would be meaningless to buy in terms of litres (or gallons!) unless you're filling a container to full.
Nobody will ever love the awkward, angular, inhuman, inconvenient metric measures concocted (on the basis of a false measurement of the earth's circumference) by a committee of French scientists ..... .... I noticed the other day how many references to yards, inches, feet and miles there are in 'Alice in Wonderland' and 'Alice Though the Looking Glass'.
This to me is the main argument for the imperial system, and it is entirely romantic. There's no scientific logic involved there but it's a very strong, rational and reasonable argument to make for its keeping. The metric system is not inconvenient though, its main purpose is how all measurements are in sync with each other. However he's right in that they don't really relate to anything in the real world - they were designed in a laboratory.
Also, you know he's totally stuck in the past when he calls the two pound coin "new".