I don’t think in metric, and there’s a strong possibility that I never will. I came of age in an educational system that taught metric units alongside imperial, but also in a day-to-day world that heavily skews towards imperial units.
If I see metric units that I can’t immediately interpret in my head, it’s absolutely trivial for me to get the conversion by other means. It’s equally as trivial for someone who uses metric to make the opposite conversion.
Anyone losing their shit about it is acting performatively.