Hopefully at some point (AXPONA 2018 hopefully!!) we can hear a direct comparison of the DEQX and LIO options. Though if this was done in a show situation, it may privilege the DEQX option due to nasty room conditions. DEQX would likely be less needed in a well-treated room. But even there, it can get rid of room effects (and maybe timing or phase issues unrelated to the room) that cannot be addressed through analog or room treatment efforts.
The measurements with Vinnie's analog crossover were certainly VERY impressive, but there are some things that an analog crossover cannot or often do not address (room differences, phase, timing), and my experiences with the DEQX have shown it to be very transparent even when employing its ADC. Certainly the benefits of the DEQX in my system outweigh any slight degradation that the ADC might add. And I have read that the current HDP-4 and HDP-5 are significant improvements over earlier models in terms of their transparency, especially in the ADC.
At the risk of derailing the thread, Jason (or anyone else) I'm curious why you think that the analog domain is superior. On the face of it, I have a hard time seeing advantages, as long as a) everything is in the digital domain and a quality DAC is used and b) there is a high quality ADC used for analog inputs.
Also, IIRC some of the DEQX use a SMPS, in which case those could be replaced with an Ultracapacitor input from Vinnie. Though the steep learning curve of the DEQX would remain.