KPerry
There's also an argument that multiple track drag into folder would also support multiple track drag not into folders - ie. for "normal" track re-arrangement, which isn't possible with the right click method.
Excellent point, although I don't know if fixing one would automatically allow for the other.
I was thinking about the code involved...bear in mind I know nothing about code, but the issue with the drag into folders might be that tracks point to folders, but folders don't point to tracks, so the folders aren't "aware" of the tracks. This also might explain why nested folders would be difficult to implement. Again, though, this is just speculation.
That said, one of SONAR's strengths is that often, there are multiple ways to accomplish the same result, and mass drag moves would be consistent with that philosophy. However if it would require a massive re-definition of the relationship to folders and tracks at the core of the program, there are probably other issues the Bakers would prioritize.