Well, MIDI data itself is still in heavy use in music production, both to interconnect hardware, and within software itself. It's the standard way to represent notes, timing, events, etc. within music-making software (DAWs).
Actual MIDI files themselves? Mostly just used as a file format to share musical/rhythmic motifs or export between music apps, not as an end product in itself.
Actual MIDI files themselves? Mostly just used as a file format to share musical/rhythmic motifs or export between music apps, not as an end product in itself.