True, but it's also worth noting that the existence of a newer version of a lib doesn't completely invalidate the older version. For example, Webpack 2 _is_ ou

True, but it's also worth noting that the existence of a newer version of a lib doesn't completely invalidate the older version. For example, Webpack 2 _is_ out, but a Webpack 1 config and setup will still keep working just fine. Ditto for, say, React-Router v3 vs v4.