Crop labor has also seen a lot more automation in general than meat labor over the last several decades. Some crop farms are almost entirely automated (and International Harvester and other brands think that Level 3 self-driving tech alone puts them on a path to nearly full automation in the next decade or so), though obviously things vary based on which crop.

On the other hand, slaughterhouses generally haven't seen any automation and other than size/scale mostly still resemble their counterparts from previous centuries.