C64 MIDI ?

So, turns out the chaps at 8bitventures created a cartridge for the c64 that enables MIDI IN (called MSSIAH) - wow, not only that it comes with a handful of built in programs for making music. This got me thinking about the main use cases for the rig, 1) use it as a DAW for chip-tunes, 2) use it as a live instrument/synth, 3) similar to 2 but use MSSIAH in 303 emulation mode for improv acid pattern jams.