I assume they want to keep their printers with 3d printed parts for the following reasons: (1) Dog fooding their own printers (in mass production) so they're r

I assume they want to keep their printers with 3d printed parts for the following reasons: (1) Dog fooding their own printers (in mass production) so they're reliable; (2) Making DIY, modifications and repairs easy on their printers; (3) Ease of prototyping and making new products. It seems that given a large production scale, (3) would not be so important. (1) seems very important, but maybe they could reduce the number of printed parts and still have "enough dogfooding"? As for (2), perhaps they could compromise on having injection molded parts that can be replaced (i.e. are interchangeable with) printed parts.