frankly speaking, Greatest Hits/compilation of hits songs still relevant in this current era. example of GH album that released 2010's onwards: Eminem's Curtain Call 2 (2022) and Green Day's Greatest Hits: Gods Favourite Band (2017) doing well on chart and sales. Also, it's like a pathway to get attention from new fans to discover the band. for us, it's an advantage because streaming platform exists. For me, personally, I will buy the CD/vinyl for collection eventhough I already owned their entire album.
For collectors: they gonna buy this as collection
For mass audience/casual fans: they gonna enjoy this on streaming platform/buy digital album
For new fans: this album gonna be the introduction to LP.