The fact that they released a Pioneer external interface. Also, it's a pretty obvious "modus operandi" : enable all interfaces to work and other timecodes (serato) without officially supporting it to draw users to your software and then lock them out or add new features only to your hardware to slowly remove third pary hardware. NI have been doing it for years. "Mysterious" calibration errors on TSP certified mixers from other manufacturers and other problems.
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