How does the cost of printing your own storage compare with commercial offerings of similar size.
Obviously print your own means you can make exactly the sizes needed but if near enough to be acceptable is less costly and can be got right now at a similar or lesser price its hard to justify complete custom. I suspect that if I had a 3D printer I'd only do custom for the things an off the shelf one really wouldn't do for. Probably have to accept some dimensional constraints to mix with the commercial ones too.
For me being able to make custom dividers to suit tricky things would be the big advantage.
Hafta say I've never managed to get a "really good right now" storage set-up to last more than afew years before running into trouble and needing to re-think.
Clive