I find all of the streaming services to be a bit too helpful and suggestive, which amounts to an overly bloated GUI for my use. I never needed help managing or customizing a playlist. I don't need to keep a playlist at all, really. I typically either choose a random album for whatever mood I am in, or random discovery like a radio station that doesn't do too many repeats.
The only repetitive playlist I keep is by way of FLAC rips on my pc. I had all of the apps simultaneously, including Amzon, with trying to decide which one to keep and ended up using Pandora for reliability and ease of use, HD be damned. For my use and age, it has occurred to me that there can be too many choices with just about everything, these days.