Once you get a 3d printer, you do tend to find many uses for them for things you could easily buy (organizing bins and the like) but I don't think anyone is buying them with this in mind.
I see it as the most important home maintenance tool. Saves hundreds per year on little things that break. Like a wall patch, small o-ring for a toy, drawer slide mount, basement light mount, etc. I will say though that the learning curve is a bit rough if you don’t have CAD experience.