https://www.techradar.com/news/itunes-is-dead-long-live-apple-music-apple-tv-apple-podcasts

iTunes' time is up. At WWDC 2019, Apple revealed that it will be winding down the iconic music platform after 18 years of music downloads, storage, and streaming, in favor of its newer apps Apple Music, Apple TV and Apple Podcasts.

Going by what was revealed at the WWDC 2019 keynote, it appears that iTunes will be phased out with the introduction of the new version of MacOS, Catalina, with the above trio of apps taking over all of its existing functionality.