Earlier on this thread I mentioned a couple of the issues that I have with those who base their judgments almost exclusively on measurements, and what I consider to be some limitations of A/B testing as it is typically performed.
But as to Amir and ASR, I think that in many cases his work is both valuable and practical. As a current example, on Friday he tested a "Hi-Res" download recording from PS Audio. He tested both DSD and PCM. What he found, and clearly demonstrated, is that the recording is flawed, and that there were dubious decisions made during the process.
As one who is not well-versed in the intricacies of streaming, I learned some interesting things from his brief video. Beyond that, and this is typically the case, I learned even more by reading the many comments, as they included insights from very sharp, highly experienced people, some of whom are electrical engineers.
Take a look at the thread, and, if you’re in the same boat as me, you will be surprised at what you may learn (e.g. that DSD files are of dubious value!).