The Numark X2 and Gemini CDT-05 had a few fans, actually, but 1) Numark and Gemini CD mechanisms were too unreliable (ditto with all the bottom-of-the-barrel CD mechanisms Hanpin uses) and 2) USB drive playback was starting to catch on during the next few years that they lacked. If they’d used USB drive reading instead, obviously both of those issues would have vanished.
If Denon DJ had made the DN-HS5500 12" instead of 7" and with a tonearm, there’s a good chance the club standard decks in the booth would have gone from Technics 1200 & Pioneer CDJ-1000 to just a pair of Denon DJ USB drive-reading linkable/master-slave dual-layer hybrids even before the CDJ-2000 was released. Heck, by 2010, the original 1200 line was discontinued. I think the move to Denon as the standard install mixer would have followed, since their lines always sounded better than the somewhat-comparable Pioneer lines. BTW, the optional, removable CD mechanisms on the 5500 are rock solid.
I would assume with the 12" and tonearm, the 5500’s firmware would have continued to get developments instead of being scrapped for lack of sales during the Great Recession and them being unfortunately perpetually plagued by issues of pitch fader mis-calibration, poor nudge/drag detection of the platter with motor ON, the ridiculous jog-mode bend deadzone AND sensitivity asymmetry, and the idiotic inability to set a hot start/cue when your hand is stopping the record.