Carrying metric and inch wrenches

I often have wondered how it is in other parts of the world, do you cuss when you run on to US built machines and have to break out those crazy inch wrenches and sockets? As an old man I have grudgingly bought my metric wrenches and sockets and taps and dies, and I can measure in metric, I just am curious how others feel about our system of measurement. Is it a hassle to buy inch size bolts and nuts?
How do you Brits do, do you also carry Whitworth tools, or is that really a non issue?...

Carrying metric and inch wrenches

Carrying metric and inch wrenches