I've been buying all my music from iTunes for the last 18 years. All my music is on my NAS and I can stream to multiple devices using PLEX. You can connect to PLEX remotely if you wanted to but I don't have mine setup. When I'm at work or traveling I just load up my phone and bluetooth to headphones or my car.
I have no desire to go back to the CD format. But, interestingly my last CD purchase was only a few weeks ago because it was the Judas Priest British Steel 30th Anniversary that also had a DVD with it.
Maybe it's time to hit up the thrift stores for cheap CDs to rip? I haven't been thrifting in a long time so I have no idea what's out there.