Maybe genetically modifying some organism to have multiple sack-like wombs would be more promising and energy/nutrient-efficient approach. Something like a tree

Maybe genetically modifying some organism to have multiple sack-like wombs would be more promising and energy/nutrient-efficient approach. Something like a tree with many such wombs, that are able to grow mammals (why limit ourselves only to particular species? Likely it's possible to make a "generic" solution). Though it's harder from the technological point of view since our biotechnology and genetics is not there yet. What worries me though, we still don't know so much about the intricacies of the baby development and birth process itself. For example, there is ongoing scientific discussion of (possible) negative consequences of C-section vs natural childbirth. And seeding human microbiome during that process. And many other aspects. To fully achieve artificial wombs all those unknown spots in medicine should be researched well and in depth.