Well, in the software that I’ve used in the (distant) past that had mixer snapshots. There were a few buttons right in the mixers GUI that you could assign the current mix configuration to. So, the “save mixer as” routine that you mention does do the same thing but not nearly as quickly or elegantly. The idea of opening a file dialogue box everytime I want to snap between mixes, speaks of a vibe killer for an overdub session, and doesn’t jibe too well with the whole marketing campaign for C6 ad being “faster” and “less mouse clicks”.
I think the first time I encountered this simple, useful tool was in Mackie’s first attempt at a DAW. I think it was called “Ultramix” or something like that, it may have even been the product before that.
I’m not asking for snapshots of EVERYTHING, inserts, effects sends and such. Just faders and mutes.
But perhaps I’m the only one working in this way…