>>I think it actually is a US law enacted by Congress a while back, to go to "dual systems," in preparation for all-metric someday (I'll have to look this up, now I'm curious). Most commercial items in US seem to use both systems now, anyway, like the can of coke I'm drinking says "12 oz (355ml)", and the print-toner by me has "store at only between a-b degress F, c-d degrees C."
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>Somehow, that seems plain wrong to me. SI (metric) units should come first, and perhaps even in larger letters.

Well, the toner has both systems with equal font on the label, and C is on the first line, F on the second line. Better than the coke. I guess different items have different approaches to the dual-system method of "introducing metrics to US." I haven't paid too much attention before now, about the ordering and font and such. Now I'll be watching labels more :-)

Anyway, I like metric myself, and that's what my hobby uses mainly too, so I don't disagree with you. And once you get accustomed to metric, it's generally much easier than non-metric (being nicely "decimal"-based). Of course I have a science background, where one learns very quickly that metric is much easier and more logical.

But what can I say about the rest of US, except that this "dual-system" method is a start in the right direction, and if I had my way, it would go faster. If I (or someone) can locate the US metric-conversion law, maybe there's a "phase 2" coming up, where metric is more dominant on all labels, or similar.