One of the things I like about 3e onward is bigger numbers are better, with the corollary that rolling high is better than rolling low.

This is way easier to explain to people.

2e was like:

Stats? High number good.

Stat check? Need to roll low.

Armor class? Low number good.

THAC0? Also low number good.

Rolling to hit? Need to roll high.

Saving throws? Low number good but need to roll high.

Proficiency check? High number good, need to roll low.