So we have two mills that I program with different limitations and it would be intensely useful to be able to utilize folders to sort them out, as well as for setups that have to start on the lathe as well. Since there are often multiple setups per part having a folder for each machine to help keep things organized is preferential.
Primarily this is in HSMWorks.
Here's how it looks now on a fairly simple part (bad) and I'd love two top level folders in this case (one for Haas, one for Fadal):