This is the exact feature that has me hooked on Google Play Music (now Youtube music -_-) and makes it difficult to move to anything else. How I use it ends up being cyclical and quite magical, really. But the radio station should not be made from a snapshot of the playlist if done right. It should be dynamic as the playlist itself evolves. For example, I maintain a playlist for "working out" and it constantly changes. When I want to discover new songs that might belong in my work out playlist I right-click the playlist and click "play radio". As I disover new songs I like I add them to the playlist, next time I start the radio those songs are automatically added as "seeds" and the cycle continues. To claify, I like the above feature where you can create a station from a playlist, but it's generated every time you click the "play radio" option of the playlist, I'd hate this feature if it just created a radio station from a snapshot of the playlist at that specific point in time and tthen I had to delete the station and re-create it. I feel like there should be two types of stations, stations that persist and we can add/remove/edit seed songs and artists, and stations that are "linked" or can be generated at will from a playlist (and overwrite old ones without hassle). When I really think about it, this is essentially just setting a playlist as the seed for a station (that updates automatically as the playlist updates)
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