To the OP,
I didn't quote you since your reply to me was on page one. You had mentioned that I was being a little dismissive. I do apologize, that wasn't my intention. I was thinking you meant MIDI as a whole...when you meant more for MIDI Editing within a DAW. Please accept my apology.
I agree with the general consensus though that MIDI needs to be included in any modern daw (as with at least some sort of ability to use MIDI Editing).
When I play out live, I actually use Sonar with it's MIDI capabilities along with Komplete Kontrol Controller Editor to get my sounds. I Create a playlist within the Controller Editor. I have every sound setup as a separate MIDI channel within Sonar. For each song, I hit the "next button" on my Komplete Kontrol which then advanced the playlist in the editor, which then refers to one of the 16 tracks I have setup in Sonar for my sounds. It can also manage splits and everything. If I need more than 16 different sounds during a set, than that is where the playlist comes into play with Sonar as well.
I use MIDI extensively in my recordings as well for programming my drums, and any sequencer patterns I want to create. I often edit the MIDI (albeit simple editing) for velocity and various mods.
Now, I do do electronic music (hehe I said do do), but I also do rock as well. I am not a guitar player, but use Impact Soundworks Shreddage Guitar, bass and drums. Their guitar is so stinking realistic, I have had guitar players ask me who played the guitar and be blown away when they found out it was synth. I do a LOT of MIDI editing for guitar work as Impact Soundworks guitar is not really an easy guitar to play live as it triggers on various MIDI CCs and velocities, so you typically have to go back in and edit various things to be within the trigger points. Some of the triggers have wide ranges, but some of the ranges in and of themselves have different articulations within the same range. (For example, harmonics might kick in with the modwheel between 70-100, but the higher the number, the more pronounced the sound). So yes, I do a lot of editing. They even state that the guitar synth is not ideal for playing live, and is more for recording. With Sonar, the editing is super easy. I also use Studio One, and while some people think there is absolutely no editing for MIDI, they would be wrong. I do find it easier in Sonar though.
If DAWS stopped supporting MIDI, then it is likely I wouldn't be nearly as productive.