It's funny to see it framed in the context of music when it's a pretty universal behavior, essentially limited only by how many cool upgrades exist for a particular hobby.

It's a particularly common affliction for photographers (better cameras, better lens, studio lighting, etc), but the same happens in lo-tech fields - say, woodworking (check out my premium chisels!) or even lawn care.

In most hobbies, it's just a money sink. It is uniquely destructive in photography because if you have too much gear, you can't carry it around and you end up missing out on shots.