I hate the idea of metric time (for a lot of use cases metric is still awesome).
12 and 60 can be easily divided by 2, 3, 4, 6. 60 also by 5 and 10. Even for 8 it’s still kind of easy.
For 10 or 100 division is easy for 2, 5 and 10 and okay-ish for 4.
The 12/60 (and 360 degrees of a circle) are such an elegant system!
IMHO especially in a setting like time where fractions are very common (like “half an hour”), being able to represent fractions with whole numbers is very convenient.