How can a Streamer make any difference if the digital stream is fed directly to a DAC? 1's and 0's from Streamer A vs Streamer B can't sound different, right? Not so fast there, Bubba.
Only have experience with one Streamer connected to a quality DAC. However, the Streamer offered sound "enhancement" features. Claimed to 1) fix corrupted digital bits and 2) improve overall sound quality. The reality is that disabling all "enhancements" produces better sound quality. The more you mess with a signal, digital or analog, the more likely to corrupt the signal.
Excellent point already made that quality of the source material will make a large difference. Have no reliable insight into whether providers like Tidal, Spotify, Amazon, etc. process source files in any way. I have done side by side comparison of a streamed track vs same from a CD. There is a difference. If the 1's and 0's are the same from either source, there should be no difference in sound quality. Have to conclude something is different somewhere.