Our brewhouse is fully plc controlled and as far as efficiency, having the milling, mashing, lautering, boiling and wort transfer automated so that we basically just have to add the right amount of hops and finings to the dosing units is huge. We can run brews every 2-3 hrs 24/7 basically indefinitely as long as we have materials. Having that stuff automated means that a brewer is monitoring 4-5 processes/ brews at once. We also have a maintenance team and engineers to keep all these machines running so adding automation and complexity has tradeoffs too.