WebKit will no longer release experimental features with prefixes (i.e.
-webkit-font-smoothing) as many have found that this can actually quite harmful:
Instead, experimental features will be shipped behind a runtime flag. Meaning the new features will be available, unprefixed, in development versions of the browser (i.e. “Technology Preview versions” or “Nightlies”).
WebKit is the last to jump on this wagon. Perhaps a few years from now, we’ll hardly use or think about prefixes at all.