Who still uses CD’s?
It’s 2015. CD sales are declining, downloads are flat, and streaming is on the rise (I think?).
What format are you using when you DJ?
Pick your main format please 
Super curious of the answers here. I figure i’ll get a ton of MIDI on this forum but still curious.
MIDI as my main weapon since 2005 =)
I would add “Timecode” and “MIDI + Other” as new options since not everyone is using a single medium to mix.
Vinyl/DVS/MIDI
in order of preference
Usb
Dat tapes
CDs
mini disc ftw
Me, but about 10% of my gigs are on cd. It’s quickly getting less as the tunes I use on cd are put on PC.