To get Amazon Music, which I like much better that Spotify, I need to transfer my Amazon account to Amazon.com.au. Amazon tell me my purchases and kindle books will transfer fine, and I can still order from amazon.com no problems. I mostly order physical things from the USA, use their streaming music, and order an occasional kindle book.
It is possible to move an account back from AU to Com.
Are there any downsides to moving my account from .com to .com.au?