That seems super useful, as my dock is overflowing with too many apps, which I all use, just at different times for very different scenarios... like for example when producing and working on videos I use FinalCutPro, Motion and Compressor, but these three take up space when I'm in a totally different context like coding. But I don't want to remove them from the dock when not used; because if I do, I seem to forget that I have them or would need to add them back later. So this solves that perfectly!