It makes it easier to divvy up into groups: halves, thirds, quarters, sixths (vs. just halves and fifths). Makes doing math easier in the head (fewer digits, checking for divisibility are the big ones).
Some info (warning: they are trying to convince you it is better than decimal, so you are not going to get a balanced argument there): https://dozenal.org/drupal/sites_bck/default/files/DSA-DozenalFAQs_0.pdf
I don't like starting my drive on a low-note of backing up out from a parking spot, anxious I will accidentally scrape a vehicle or bonk the curb or whatever may it be. Ending the drive by backing into the parking space means next time I leave I'll start by driving forward to pull out.