There are at least 5 of these Stout Brucontrol based systems of varying level of installed data gathering sensors now in operation and people get really interesting ideas all the time on what to test. For example, in the past brewers have wondered and tried to calculate/guess, how long it takes for ferment CO2 to bring an empty keg down to zero oxygen. So someone with a system like this and the probes decided to actually test how long it took. He had O2 sensors in the keg and one in the outflow stream just to be sure the data was good. Now we know the actual answer, not just a guess. We also know how long it actually takes the yeast DO method to scavenge all the O2 in the strike water, what is the best dose of yeast and sugar and how do different temperatures effect that speed. Also how long the water will hold at zero DO. Another guy also has a nitrogen generator and set out to find out how long it takes to purge the grist to zero DO. We also found out how many purge/fill cycles is takes a beer gun type filler to bring a bottle down to zero DO. Currently there is a lot of work going on about getting the most out of grain enzymes and improving attenuation. These are just a few examples of the mounds of data that is amassing.
It used to be when you asked a question on a brewing forum about some process, the best answer you could get was, "I tried that but didn't notice any difference".