They are better because:

1. Hum they are logical
2. They are ready for language translation

So why?

1. People needs to know about them
2. Legacy projects that needs both syntax or a complete rewrite
3. Conflicts: if a non-logical and a logical property currently affect the same thing, it’s a specificity (including source order) game.
4. The rollout doesn't feel totally done: linear gradients with to left and to bottom, translate, etc...