Language

Grid is one line. Flex is three and gives you control over the axes separately.

auto-fill with minmax reflows on its own, so the column count follows the container rather than a breakpoint list.

Ellipsis after two lines. The -webkit- prefixes are still required despite being supported everywhere.

One rule that disables animation for people who asked their system for less of it.

Hides a label from sight while leaving it in the accessibility tree. display:none would remove it from both.