Certainly not the majority. Scene releases still feature, but they are no longer consistently the first to market, and they are almost universally derided for prioritising speed over quality.

Scene rules are anachronistic and slow to change. The MP3 scene stuck to -V2 VBR for far too long, for example; the change to -V0 VBR in 2011 came as the sharing of FLACs was already ubiquitous outside the scene, and it wasn't until 2012 that the FLAC scene was established. Even now CUE and LOG files are not required from a CD source, which is insane.