The streaming music platforms will soon follow the lead of the streaming video platforms and continue to raise their rates, which I’m sure will be helped along by the record labels that increase their licensing fees because they want as much of the action as the video streaming platforms.
The whole ecosystem will eat itself, and we’ll all go back to pirating music again (but the cool kids will keep buying vinyl and CDs and digital copies off of Bandcamp).
I’ve been seeing it mentioned in comment threads on some of the sites that have posted about Disney raising the rates again, notably MacRumors and I think something similar on The Verge. Monthly rates will continue to go up. Meanwhile, external hard drives and basic MP3 players are cheaper than ever on Amazon. It’s inevitable.