12 is, in many ways, a better base than 10 (divisible by 2,3,4 and 6 vs 2 and 5). And it was used in many British/Imperial units. But the chance of the world moving existing systems from base 10 to base 12 is surely so close to 0 as makes no difference?

In premodern engineering they used twelfths. The foot ', inch '', line ''', and point '''' were each 1/12th of the previous unit. (Yes, they used quad prime marks.) European typographic points were 1/144th of an inch. https://dozenal.org/

Yes, but hexadecimal eight-bit computing introduces the octet as specifying information protocol (255.255.255.255) addresses.