Oh man, so much. MIDI editing capabilities (that’s the biggest one), logical editor presets, quick controls (a total game changer, especially when paired with track presets), the generic remote, macros, VCAs, even some transport functions. And literally every function is key-mappable, even macro commands you make yourself. Or you can control them with MIDI via the generic remote. So you can set up ridiculously fast workflows (though, it does take a lot of time and trial and error).
Plus, for my game audio work, being able to connect to Wwise from inside the Nuendo session cumulatively saves so much time.
I had a “great DAW-off” about ten years ago (had moved from DP to Logic, Logic to Pro Tools) and was never satisfied. Took a long, as-objective-as-possible view to find what had the most capability to work fast, and Cubase won by a mile. I revisit things every so often, most recently digging into Reaper (which is awesome, especially due to its script-ability), but Cubase still wins in terms of fast workflow.
That said, I’m primarily composing to picture (usually orchestral), usually requiring big templates (via Vienna Ensemble Pro on multiple servers), so Live is already out as a serious contender for that. I LOVE Live for what it is, though, especially as an idea-generating or sound design environment. Using Live in ReWire mode with Cubase is one of my favorite things, as the two compliment each other really well. But there are some basic “quality of life” things Live lacks, like a horizontal zoom key command. Sure, you can drag with your mouse, but one of the keys to working fast is using less mouse and more keyboard. It’s small stuff like that, but it adds up, so working in it standalone always feels super slow compared to Cubase.