Anyway, I’m enjoying it all, though, I have to say, not yet very enlightened. So thanks again.
op - i have had some fun on this thread you started...but here are some (serious) key points that may help your quest for enlightenment on the subject
1. it all matters, from ethernet/wiring, cabling, noise management (digital signal, power supply and mechanical), and of course dac and streamer
2. but dacs matter most ...up to a certain level (call it well reputed ~$6-10k+ dacs, then they converge in sound) - below that level, dacs sound pretty different as all sorts of cost/quality tradeoffs are being made
3. in general up to that high level of dac where sound quality converges, i would say dac choice drives sound quality 75-80%, rest derives from streamer selection and the rest...
4. but... and here is the big but... once you are into that high, truly excellent level of dacs (msb, top chord, weiss, bricasti, totaldac and so on), in order to get the most out of these, let them fulfill their potential (call it getting your money’s worth out of what you paid for that superb dac), everything feeding it from upstream needs to be pristine.... streamer, ethernet, noise filtering, jitter control, connections, computing (roon core, that ilk)... and the high level of dacs, the underlying technology matters less (r2r vs bitstream), the makers have used whatever technology they have chosen to deliver the end result (great great sound), and then it is more about features, form factor, connections...
5. one can get terrific sound at a lower level of cost than isolated computing to streamer to super dac... but as usual, in this hobby, just like in analog, speakers, amplification, you spend alot, work hard, make great efforts for that last 10-15-20%....
good luck