Coincidentally similar story, but with a different end -- I eliminated a test station from the final assembly line for Astro (Amazon's home robot), because there were no unique failure modes that the test station could catch (we collected ideas, and then went through and analyzed every failure mode suggested, they would all be detected by other stations). I think we estimated that was ~$1 million savings, in addition to simplifying the workflow and reducing time spent to do final testing. I brought this up with my manager when pushing for a promo, but he told me "somebody else made that value, you just stopped it from being thrown away", lol. Maybe I should have pushed harder, but I definitely felt underappreciated, and am still not sure if I could have gotten better recognition for it.

Don't feel sorry for me though, they still paid me well enough, and I'm happily doing my own stuff now :)