Depends on your tastes. If you only really care about say 100 ish or fewer CD's worth of music then you can easily hit that and save money vs a streaming service. So for someone like me they are a complete waste of money.

Remember, 70 years * 10$ / month ~= 8,400$ for music over a lifetime. By comparison you can easily buy say every piece of music by Bob Marley and your done no need to ever do so again.

Sure, if you really care about music then a service is great.