I do. I own a few CDs that are nice collectors editions or in nice cases. Most music CDs tend to just be paper sleeves or classic cases, though. There's no real advantage from just buying on Bandcamp.

As a musician I'd honestly someone rather just bought my stuff on a Bandcamp Friday.

I tend to only buy nice hardcover books that mainly sit on my shelves and look nice (and get read on the odd rainy day). Just something nice about having a tangible, premium feeling version of something I enjoy.

There's no real equivalent in music. Most CDs are cheap and cheerful to keep costs down

Blimey, I'd be scared to do anything like that nowadays without source control.