2000 Nexus upgrades?…Like some way of being able to use Lossless audio?

It will play WAV and AIFF, what else would you like?

even the chipset of the old 2k was able to Play flac out of the box ;-) pioneer Need just to implement/unlock it in the Firmware. also higher samplingrates are possible on the spdif (48khz) of Course this will never happen. :-)

I don't think Pioneer likes to add such major features to older players, reliability, sales figures of newer models etc.