Windows NT most definately was. You are talking about the 15-20+ year old Windows 1/2/3/9x.

The London Oyster Cards took quite a while to settle down. In particular there was a big mess with the above ground trains (partly this was because of reluctance/stubbornness from the train operators). There were days when the whole system failed.

London is a complex mix of trains/tubes/busses/trams etc so often there is more than 1 route between 2 stations. Sometimes the system would charge you the wrong price.

Common usage is overstating it. Nothing you can buy is marked in ozs and lbs. Some things still come in suspicious kg weights - e.g. a jar of curry paste is 283g (10 ozs). Schools haven't taught imperial since the 70s.

About the only common non-metric units are pints and miles. Peoples weight is often (though not exclusively) expressed in stones and pounds.