In my view, there are a few reasons why Google Play Music isn't as popular as you might expect. Firstly, it's not as user-friendly or visually appealing as other platforms like Spotify. Secondly, the subscription cost might be a barrier for some people. Thirdly, folks may already be invested in other music streaming platforms, making the switch a hassle. Lastly, there's an issue of not having as extensive a music library as some competitors.