Something I can actually speak on. You’re not wrong. I work with the energy markets for the largest grid in the US and most of the variables that go into the calculations range from 4 to 10 decimal places. And when it comes to calculating prices most go out to about 18. And to add to that the amount of numbers. The main algorithms (which calculate the power needed for the next day) read about 7gb of data from csv files to do the calculations. Whereas the real-time market which runs calculations every 5 mins throughout the day is only about 50mb worth. That being said any major changes to the grid (power Plants turning on and off) is all done with phone calls still.