I expect the answer is that printing is a rat's nest of patent protection, trade secrets, etc. It's not easy to make a laser printer from scratch. And now you

I expect the answer is that printing is a rat's nest of patent protection, trade secrets, etc. It's not easy to make a laser printer from scratch. And now you want a business model based on charging commodity costs for both the hardware and consumables. Which leaves essentially $0 for development costs, which are substantial.