I have PURE SPECULATION, no idea if true, BUT: What if a "progress bar" or "progress indicator" is some kind of patented technology that apple can no longer use without paying someone. So they intentionally removed it. They do get lots of lawsuits. OR... Apple has been moving away from allowing you to save/use your OWN CONTENT that you copied or made yourself and play it back on your apple devices. They have pushed really hard to make you use subscription services like Spotify or Apple Music so that they can turn everything into a stream. They really don't want you to collect or use any media, cept maybe pictures or home movies you make on the device.