I think it could be very useful in some cases. I’m working mostly in the Sampler (Redux style) using an external sequencer to trigger Instruments. Then I want to apply a VST reverb with different settings for each Instrument, while keeping a common set of MIDI Mappings (having only one of those Instruments loaded at any time).
The motivation behind this is explained quite well in this thread:
Also, perhaps a lesser known trick, mappings can be stored in individual effect/chain presets. So you can prepare a nice preset with ready-to-use mappings and import that into any song you have.
Thats how I knew it used to be a feature in Renoise.
At the moment, MIDI Mappings for device parameters are stored/restored with:
- Songs
- Instrument presets
- Modulation Set presets
The only exception would be with Effect Chain presets (where mappings are only stored).