All plans use mm exclusively. Airport blueprints, for example, are in mm. At first blush it seems excessive, but it makes sense from a consistency & accuracy POV - 6.096m takes up 2 more characters than 6096 - they don’t even need to specify the units “mm”, because it is assumed, and anything else introduces room for error.

Woodworker in US here, and I prefer metric. Also consider the thickness of plywood is actually in metric now - “3/4” is actually 18 mm but they have to market it as 23/32.

I’ve chosen to join the other 8 billion people on earth.

For anything construction-scale, all supplies sold in the US are based on 4x8’ sheet goods and 16-24" on-center framing. I also concede that king George the 74th’s foot length is more human-scale when dealing with large measurements: 20 feet vs 6096 mm. I still use metric when possible, however - I find it easier and more accurate.

For EVERYTHING else I’ve switched to using metric.

Context: I grew up in the US using imperial units and only pivoted to the metric system in 2020. If I grew up thinking in metric and building supplies/standards used it, it’d be superior in every way.

TL;DR I like my imperial/metric combo tape measure.