In practice there are still some throw backs (pints of milk or beer) except that EU directives mean that the 4 pint milk container has to be labelled 2.27 litres, etc..
Switching my mental model of pricing of fruit was quite hard but it's really annoying now that supermarkets still list imperial prices alongside (and occasionally in breech of regulations, alone). Metric prices are larger numbers and they want to convince us they're not overcharging. Unfortunately my regular supermarket have taken to pricing by the item or bag for fruit - causes no end of problems, all the bags are different weights. More expensive items in 800g bags (or 750g), less expensive in 900g or 1kg. Good for keeping my mental arithmetic going though - which is cheaper those apples for £1.20 a bag on 3-for-2 or these for 40p each with a coupon for 10% off ...! /rant
