That is why I am in favor of not having this obligation. I don't want to spend engineering, design and testing resources on something other than making a DAC produce excellent sound.
Those connectors by the way can also age, loosen, build corrosion, etc. Yes, there are good connectors out there but if we are to accept that any interconnect has a sound, and this and that type of conductive material is important, how does one deal with the way those connectors act and work in this regard?
Now, the one thing that I like as a consumer in modularity is repair. It is nice to be able to remove boards to work on them, see if they are causing a short, etc. So it is not without benefit but from "getting the best sound" it is a barrier. One that can be climbed over as you say but why insist on having such barriers as criteria for purchase if sound quality is king?