It’s true that the vast majority of the world uses only metric but Western English speaking countries tend to use a mix.
The UK is mixed, Ireland (where I am) is mostly metric but a person’s height is still mostly imperial and butter is sold in 454g packs (a pound) and older folks still measure their weight in stones and pounds, Canada uses a mix (my sister lives there and we discussed this recently) and the US uses metric where appropriate (science, military, medicine).
It’s true that the vast majority of the world uses only metric but Western English speaking countries tend to use a mix.
The UK is mixed, Ireland (where I am) is mostly metric but a person’s height is still mostly imperial and butter is sold in 454g packs (a pound) and older folks still measure their weight in stones and pounds, Canada uses a mix (my sister lives there and we discussed this recently) and the US uses metric where appropriate (science, military, medicine).