I'm an avid music fan, and have a large collection of vinyl from days of yore, when I bought what I could afford (i.e. 1/10 of what I wanted to buy). I've never been a 'completist' though, and I simply don't get the need to acquire all versions of music you already have. I just like the music, I guess. A friend and I have an interest in a particular band. We both have all their albums. I've got them once on vinyl or cd (and one on cassette). I can listen to them all on spotify. He's got everything on all available formats, and he's just spent a small fortune on a re-released version of an old one that he has about 5 times already. Each to their own, I guess.