There are a bunch of CSS properties that we can safely stop using vendor prefixes for, or at least considerably cut down on the number of prefixes.
No need to provide vendor prefixes for all versions ever of all browsers ever nowadays. Take CSS3 transitions for example. The code below will do just fine in most cases:
.example {
-webkit-transition:background-position 0.5s;
transition:background-position 0.5s;
}