I only use USB as that offers the highest allowable sample rates for playback in my system. I typically buy the “native” sample rate file the music was recorded at and store on my MacBook Pro. I use Tascam’s Hi Res Editor to resample the files to the format supported by my server and/or dac.
I like the presentation DSD offers but honestly I usually stick with purchasing CD’s. I would get into it more if the cost to purchase was lower and there was a larger selection within the genres I listen to.