I'm used to picking up the guitar, playing a few chords and writing a melody.
Ableton (or any other DAW) feels like a chore. I have to boot up the computer, connect the MIDI keyboard, the audio interface and the headphones, then wait for Ableton to load, then create a new track and add a MIDI instrument before I can play a single note.
I know the sessions view in Ableton was an attempt to make the music feel more like jamming, but it doesn't really work for me. A lot of musicians who play instruments I've talked to feel the same way.
I would love an "Ableton in a box" that feels more intuitive and immediate.