Machines have a lot of disadvantages that aren't readily apparent. Machines have to build collection systems or mine energy sources to thrive. We live on stuff

Machines have a lot of disadvantages that aren't readily apparent. Machines have to build collection systems or mine energy sources to thrive. We live on stuff that grows out of dirt-- that's pretty handy. Of course, machines could become more and more advanced if they didn't go extinct in those first pivotal years, but I think it'd be to the end of looking organic. And if you're going to life out of something, make sure it's low on the periodic table. We're carbon-based because that's what works.