Weights and measures for cooking: your thoughts.

I (M and to old to tolerate much shit) was brought up in the UK and learned to cook there using a mix of Imperial (lbs, Oz, fluid ounces etc), and metric measures. With online recipes I get the US measures in cups.

My best to worst system and why.

Best: Metric, just for precision. Middle: Imperial. Not as precise as metric which can be an issue when baking. (Yes, I like cake). Worst: Cups. Total lack of precision. The only thing I want in cups is coffee.

Your thoughts?