Hi Fig,
I'm sorry if I sound condescending, or that this might sound like a rant. It comes from my own personal experience.
In my last case the recording engineer knew beforehand that the tracks were basics, and that a lot more work was going to happen after him. The comment from the Producer was this "Oh, I guess I won't be going back there again".
In the world of "D.A.W" what is important is to be able to deliver a hard drive to the client, have them fly or drive to another studio to continue work, and have the session show up in the new studio EXACTLY as they heard it in the previous studio.
I get this often, since some of my clients get other singers and performers to collaborate with them on a song. Not all these artists can be driven / flown in to my client's home city, so the producer or myself will go to where these other artists reside, in order to record them.
This is why D.A.W. can be so powerful - because they allow an artist the freedom to go work anywhere in the world, with whomever they want, and not have a lot of time to lose on setting up hardware.
Sometimes, all I have to do if FedEx a DVD with the audio, and then simply receive back a Pro Tools session with the new audio via FTP site, and continue my work.
There are a lot of clients that I work with, who do this kind of recordings i.e. Scratch demos at their home DAW, then basic tracks in another city in a big facility, then more overdubs back in their home, sending a Pro Tools session to another artist via FTP / FedEx,then final mixing in yet another big facility.
Now imagine the scenario if at every juncture, each engineer had to redo rough mixes from scratch, and even use different DAWs. Do you know what a waste of time that can be? I know, I've been there, and believe me, it is no picnic.
But, you can do whatever you like with your clients. If you do not do this kind of workflow I can understand why you do not care to pass on your plug ins and rough mixes. I just like for my clients to work on their albums without having to worry about any technical issues, nor any engineer issues, and have the mix they heard in studio A come up in studio B sounding the same.
Cheers