It seems like you would want to build a high surface area framework/scaffold of the 3-5 dependent layers above the actual production of milk. One semi important

It seems like you would want to build a high surface area framework/scaffold of the 3-5 dependent layers above the actual production of milk. One semi important question is how do you determine which genome to use. Each cow for instance produces genetically different milk which is based on its genome and epigenome. My guess is we can probably get to a near product pretty quickly with known tech and the next century will be consumed with making adjustments as more is uncovered about the role played by systems not included in the model. Eventually you will likely end up with a basic model of every system in the cow to achieve actual milk. It is curious how so much bio technological/financial effort is spent on something that not only does not contribute to the extension of human life but also serves no other purpose than it’s own end. In general milk is more of a cultural commodity than an anything close to a necessity. Personally I would much rather biotech focused efforts on life saving/extending tech and then we can address other desires later like more perfect hairlines, longer orgasms and memories ect, but such is the conundrum of capitalism trying to determine which humanitarian goal to solve.