Developed counties not using SI units

So I understand changing up your system of measurement could be a bit of a chore. And I completely understand clinging on to a temperature scale based on fish brine smoothies for nostalgia. I get it, its quirky. Like totally makes sense. But even the kings of holding onto archaic traditions, the UK, have manage to wriggle free of its irrational grip and have put in a decent effort. Yes, we’re all looking at you USA…