Consistency is huge. It's amazing what some of those guys will get out of their equipment. I spent some time talking with a guy who builds data acquisition equipment. Most of his customers started using his sensors in the 80s and until the system either breaks beyond repair or the entire team of scientists has retired, they want to keep the exact same setup. Amazing dedication, but the benefits of testing with the same equipment over many years can lead to some great observations over the long term.