I wish they would move towards numbered &quot;feature prefixes&quot; e.g.<p>-feature555-flex-direction: column;<p>so that:<p>1. a browser vendor can introduce a feature and have it used even as an experiment<p>2. another browser vendor can decide to implement the same draft spec<p>3. if an incompatible change is made to the spec (flexbox!) then change the feature number<p>4. they should always be documented per feature (like RFC&#x27;s).