Another angle is that the user might be referring to the media scrubbing feature in other Apple apps or devices but is specifically looking at how it's exclusive to Windows and Mac. For example, when syncing media from a Windows PC to an Apple device using iTunes, the scrubber is essential. Similarly, macOS users use the Music app, which has a similar scrubber. So the feature is available on both platforms but not on Linux, Android, iOS natively (except when using iTunes or Music app), or other platforms.