Personally I love MIDI. I was amazed, when I returned to music, at what could be done today. There are many great hardware synths, & software synths are being improved daily, so I believe the "suck sounds" will eventually become history.

Real Tracks sound great, but eventually there will be a limit to what can be produced by the user without buying more RT. You get what you got.
MIDI is unlimited. (to my mind at least.) Virtually anything can be edited, moved, removed, added etc. Not sure if you can create your own styles with RT?

Besides...I play a Synthophone. (a midi sax) While I record using the audio from my synths, I can also record the midi.

Mick

www.mickemery.com