Australia switched to 570ml, rounding up. Would that be acceptable?

I would have agreed with you for a long time (especially when I was very aware of how many pints I could drink and still work well the next day), but since homebrewing and having my own beer taps, I now drink any amount I want. I have a few half pint jugs I use, but often I'll pour myself a drink that would be less than this, as that is what I actually fancy drinking at that time.

That said, I exclusively drink pints in pubs.

Everywhere. All the car companies in the us switched to metric in the 1980s. You find some inch stuff once ina while - but only when the part hasn't been changed in the last 40 years.