Streaming is very convenient. I rarely rip my CDs anymore. I use Apple Music service exclusively after trying various services. My rips, downloads and streamed albums sit together in my library and are available to me using any Apple device to which I am signed in.
Data usage will be an issue for many. I have unlimited data on my phone. My car’s wifi is also unlimited and I use Apple Car Play. I can tap a button on the steering wheel to bring up Siri and request play of any song or album available on Apple Music. “Hey Siri, play The Monkey’s Uncle by Annette Funicello on Apple Music.”
The iPod Touch Gen 6 supports Apple Music. Music from the service can be downloaded to the device and available for playback when an internet connection is not available for use. But, with very limited storage, downloads will be very limited as well. Apple Music service can be sampled for free quite easily.