I find that PHP7 has let us all move on from the past. PHP 5 had a very large range of features. If someone tells you they use PHP 5, they could be anywhere from 5.2, (no namespacing, traits, etc) to using version 5.6.
With PHP7, we have a good base of features and speed to work off, and we know what those features allow us to do. Hopefully any large changes like Namespacing, would go into a new level release, like PHP8.
It's time to forget the past of what PHP was, and start focusing on what it is, and can be.