In real money:

1 US pint = 473ml

1 UK pint = 568ml

Meanwhile the standard metric measure is 500ml. So US would benefit from dropping the pint in favour of metric, while UK drinkers would be understandably reluctant. Unfortunately, most UK bottles are now 500ml, thanks to shrinkflation. Newcastle Brown held out for a while, so did ciders, but these days pint bottles are quite rare.