The software is still in a strange transition between the old layout engine and the new OpenGL one developed by CERN. I believe the old interface is being kille

The software is still in a strange transition between the old layout engine and the new OpenGL one developed by CERN. I believe the old interface is being killed, but not immediately - you can switch between them as you use Pcbnew (KiCad's board editor). I initially found the old interface to be more intuitive, coming from Eagle. I used the new one for my most recent boards (primarily due to its support for differential pair routing), and once I learned the interface I now much prefer it. There are still a few quirks, like, for instance, if I want to delete a whole track, I find it quickest to switch to the old interface and press "Del", then switch back. The new interface only deletes segments of tracks with that key. Saying that, despite the rough edges it's pretty solid and functions effectively in the professional and research environments I've worked in. It's only going to get better, too, as the community grows and the new interface fully replaces the old one.