I don't know, Celsius is actually very nice. I think there is another problem, where same dimension is used in fundamentally different contexts.

Let's talk about mass. For small quantities you can use grams all right, though one gramm is still to small to be useful unless you're dealing.

But you surely need kilogram (pronounced kilò in Russian), and for bulk shipping you need megagram (nobody ever uses this word, but you have ton fortunately).

Again, meters are useful for heights and sizes, but useless for distance. Here you need kilometer. No shorter word for that, buddy. And for large distance you need thousands of kilometers. Nobody ever uses megameter, again.

You can have single 10-based system but you still need different words for quantities differing by three or four orders.