>>I'm baffled as to why SACD and DVDA's have not gained more popularity.

Because so many of us are too lazy to hook up the extra connections or fiddle with the player to output SACD over the stereo connection rather than the compatibility tracks. We listen to the CD-compatible tracks and say "sure, it sounds a bit better, but not profoundly better"

At least that's my excuse.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8