Although currency went metric in 1971, most other things did not until maybe 10 years later.

Beer is sold by the pint. We use miles not km.

Many companies never really co-operated. Yes, food is packaged by metric weight, but instead of packages being say 250g, 500g, 1000g most tend to be 454g (1LB), 227g etc.

If you go to a 'tradesmen' at a timber yard for example and ask for 2 metres of wood, first thing he will do is get the calculator out, convert it to feet and inches, and then start measuring

You buy a dozen eggs, 6 pack of beer etc. Many places show imperial/metric together.

I guess we are only half metric. The rest of europe is totally metric.

Anyway, BJ and PS showed metric dimensions in catalogs long ago