There's a reason "naming things" is one of the great hard problems of programming. Especially when you have to name hundreds of things while developing i.e. a framework. Unless it's a solo pedantic developer creating the entire thing, inconsistencies will crop up, some names won't age well, some names don't quite capture the thing they are naming, etc.
justify-content: center -> justify-center
align-items: center -> items-center
Just… why?