I’ve never met anyone who wasn’t acquisitive to some degree.
When I worked manufacturing, I watched guys who made the same money as me (not much) constantly buy new pickups, new fishing boats, racing sleds, quads, camper trailers, firearms, classic cars, etc.
It’s all about the community you have around you.
Shaving gear is pretty cheap thrills compared with a lot of the things I’ve seen people collect. This is probably the cheapest hobby I’ve ever had.
How do I decide what to use? Depends on the kick I happen to be on currently. Depends on what I’m reading about. I like to give my soaps and brushes a few days to dry out between shaves, so that’s another reason to have a small rotation. I’m barely approaching a half-dozen of any particular item, so it’s still a relatively small one.