Sure, there are various degrees of "snake oil" or whatever and not everything is an outright scam. I fully agree on that.
But there are still plenty of false/unproven claims and beliefs being perpetuated with legit products. Sometimes straight from the manufacturers and very often by the larger "hi-fi community", whether it be hi-fi magazines, merchants, reviewers or just random users. Some of these people (most notably hi-fi magazines and merchants) have a vested interest in perpetuating false/unproven claims.
The end result is that a lot of clueless people end up buying stuff they don't need, without having even the basic understanding of how this stuff works.
I've seen so many posts on various forums... like here's
an example just from a few days ago. And that's on ASR, imagine how silly such threads get elsewhere.
And while I don't lose sleep over people spending money, the consequence is that it pushes the market towards products of dubious value that don't offer anything new. Like more boring featureless DACs, for example.
Of course all DACs don't sound the same, but I believe that those that measure beyond a certain threshold do. And no offense really, but I'm not interested in personal anecdotes of sighted listening tests. Only in properly conducted blind tests. If something comes out of those, I'll eat my proverbial hat and apologize.
The test I posted isn't that great, frankly. But I think it's still probably honest and it's more to illustrate a point.
The test you posted isn't really blind. If you have access to files you can easily open them in an audio editor and
see the trouble makers. But even if nobody cheated, the results wouldn't surprise me. Some of the noisiest DACs I heard have been from motherboards.
Partly because of low latency applications and partly because of general stability (no OS shenanigans) and portability (using the same setup with various sources).