Could it be that the DAC in the streamer is better than what you used when using a computer as file source? So what you are hearing is not computer vs streamer, but different DACs.
I’m not going to say this is total garbage , but it indicates very low knowledge about what is going on here. Most of the high end streamers most are referring to here do not have built in DAC’s, so no that is not what we are hearing.
Even if you don’t like Winer,
But what this guy says is total garbage. I didn’t read this article but from some posts I have read from Winer previously, anyone who claims cabling doesn’t make a difference is not an audiophile. Winer, just like ASR proponents, if people do the exact opposite of the advice given from them you will most likely get better sound. If someone built a system using a batch of "not recommended" components I bet it would sound pretty good.