From the various CES and CEDIA Q&A sessions:
Q: Is there any chance of enabling the F80's digital input to accept 96/24?
A: We could but the playback circuits in F80 run at 48kHz, i.e. we would need to downsample. Optical links tend to be less reliable at 88/96k.
Q: Is the F80 capable of outputting 96/24 (e.g. from the tuner)? If so, could this be done?
A: No. this is limited to 48k 24 bit and it is hard to justify wider bandwidth for DAB, FM or AM.
Q: At CEDIA 2008, Bob stated that the F80 does not have any FIFO buffering. Not even internally off the ROM drive? Does the F80 have a PLL on its optical input? (just trying to gauge the criticality of jitter when feeding the F80 optically with other sources).
A: The F80 is not built to the same architecture as the mainstream audio components. So there is no FIFO buffering off of the CD drive, although the playback uses successive buffers. There is a PLL circuit on the TOSLink input.
Changes are unlikely to happen as, I'm told, Bob moved on from the F80 project "mentally" some time ago.