iTunes questions: Old libraries, Windows, 4K, HDR, Dolby Atmos over HDMI, and more

Samuel Axon for Ars Technica:After much speculation and fanfare in the press, Apple confirmed [yesterday at WWDC19] that it will sunset iTunes in the next version of macOS and spin its functionality into three new apps — Apple Music, Apple Podcasts, and Apple TV… This marks the end of an era of sorts on the Mac — but there were plenty of unanswered questions. What features will Music retain from iTunes? And what happens to Windows users who are dependent on iTunes?MacDailyNews