I find myself attracted to “Steampunk”-old brass gears, rivet heads, etc. Has anyone ever designed kitchens and bathrooms in this style?
Yes, yes it does (same house, two links). Retail spaces as well - this is a local coffee shop
You might find something you are interested in here.
It’s not quite brass gears and rivet heads, but it looks like a lot of wood and copper and has some of the same feel.