I mean, you theoretically still could have that, USB decks send MIDI signals (even though I found it a bit obtuse trying to get my FLX4 to control anything except VirtualDJ - I was trying to map it to grandMA lighting controls). The TUI here could be primarily a presentation layer. I think the main benefits would be a) more hackable than VirtualDJ and b) it looks cool.

I think for algorave stuff it's great because I'm already at the keyboard, but I totally agree with you otherwise. I was thinking (way too complex at this point) of adding control macros to be able to "turn" 2 knobs at once, because that's something real hands and knobs can do, but not this TUI atm.