They should complement each other. My DSD recordings from SACD are the best sounding in my collection but red book and streaming can also sound excellent. Not all music is available on SACD and the future of the format isn’t bright
Music through streamer vs CD/SACD
I wonder what method is used by the platforms to upload music to the cloud, I imagine something simple like a digital ripper or hard drive on a PC. For this reason, I consider it useless to rate the sound quality if you have high-end equipment. I think that listening to an SACD on a +$15k player to compare with a streamer of the same price range, there will be a noticeable difference. What do the experts here think?