WPT details: https://wpt.fyi/results/css/css-view-transitions/style-inheritance.html?label=master&label=experimental&aligned (WebKit recently added animation-delay subtest which may not have been included in the results yet)
View Transitions project adds a tree of pseudo elements that have various animations applied to them. For ease of development and customization some niceties are provided, such as inheriting animation-duration. This feature adds another nicety: inherit animation-delay.