I agree that this would be great. But on the other hand I also think that Amazon really did their best to encourage app developers to implement frame rate matching. They added a global switch for it in the system settings. There is no one available on Android TV. I guess Amazon thought that this way apps could add support for frame rate matching without the need to provide an option to enable/disable it within their own apps. Like they would have to do on Android TV, because there has to be a way to turn it on or off somewhere. As you can’t force frame rate matching upon all users as a default.Lots of recent posts about 4K stick matching frame rate to content. I just wanted to point out that it's not just the content, but the streaming app has to support frame rate matching. Would be great if the stick could simply detect the content stream and match framerate, regardless of app.
But unfortunately Amazon wasn’t rewarded for their effort. Maybe because app developers don’t want to have a separate Fire TV version of their app, but just use the same one as on Android TV. But in my opinion the app developers and Google (not providing a global switch in the Android TV settings) are more to blame here than Amazon.