Seconding this.

The reason we even care is that maintaining two systems is heavily impractical and adds to confusion all around the world - simply because 4% of world’s population can’t bother to make a change.

We wouldn’t care what you use - perfect barbecue temperature scale, length unit of football field, weights in blue whales - if it wouldn’t affect the rest 96% of the world who have to decipher your blubber.

Everyone uses Celsius and metric, make a damn switch, it’s not that hard and you won’t lose anything. You only use it because you’ve used to it, there is literally nothing else to it. Everyone switched, everyone’s happy with it. Do it already.