I've been collecting Mosaic sets for decades. I also own more books than anyone I know. I have other good-sized collections of physical objects, like guitars, board games, cookware, etc. So I think I get the idea of collecting physical objects.
78s, 45s, LPs, CDs, SACDs, laser disks etc are all physical methods of music distribution. Streaming and downloads are also methods of music distribution but do not rely upon a single physical object like a CD or LP but can instead be kept on various types of devices, copied, moved from device to device and so forth. These are still a conveyance for music, just more fluid about where the actual music data resides.
Some people collect music as physical artifacts: LPs, CDs etc. The physical thing is part and parcel of what they are collecting. Their experience of owning music is one to one with owning physical objects. I have no quarrel with this and do it to some extent myself. Others, myself included, are in recent years mainly collecting "music", not the artifact containing the music. Similarly, I still enjoy album art and accompanying booklets but mostly view them via photographs. Which distribution format the music came in is less significant to me now than owning the music itself, which is to say: being able to access the music (and discography) whenever I want to listen. I'm still collecting but not any one format or delivery mechanism. I do not claim that my collection of "music, regardless of the delivery format" is superior to anyone else's style of music collection. I can certainly appreciate and even envy a fine collection of vinyl even though I don't have one.