Why so few devices with BNC's??

@russ69  Uh....  yes, we know that.  A few bucks (maybe) vs a few cents.  And yet the Anthem STR preamp (>$4000), NAD M33 (~$6000) and McIntosh C49 ($5500) and have RCA's.  This is "premium" gear using a demonstrably inferior implementation of the spdif protocol.  To get BNC on McIntosh you have to get the $8000 D1100.  There are countless other examples.  Yet few "audiophiles" really seem to care.  Despite that people debate over about premium coaxial cables with RCA terminations along with all manner of other unmeasurable unicorn juice like fancy power cables, elevating speaker cables off the floor, power condtioners, etc etc. 

And in this case one might make the technical argument that the mismatch doesn't become significant until the signal frequency is in the RF, so not audible.  Well, maybe.  Yet how many people here obsess over the sonic differences between 24/96 and 24/192 or whatever?  God save us.

IMO there's no sense in even talking about digital coax using RCA's.  It's simply a flawed implementation.  People can argue about whether it's significant or not, but it's flawed regardless.  With proper BNC's it's no longer an issue.  Then the subjectivists can simply debate the merits of 70 ohm cables. 

I've taken the approach of simply not using gear with RCA's in my "serious" setup.  If the manufacturer can't be bothered to go to the trouble of having a BNC connector then I can't be bothered to buy their stuff (same goes for AES/SBU ro the absence thereof).  There have been a couple exceptions though, where I've gone to the trouble of retrofitting BNC sockets.  I did that on my Cambridge CD transport and some other gear in the past. 

Interestingly there IS a fair amount of gear with BNC's, and it seems to generally be such "boutique" suppliers as Lumin, higher end Schiit stuff, Bryston and numerous others.  Mark Levinson or the Japanese?  Not so much.