Do you do work where you have to inspect large data arrays? The ability to pause execution (say, training a neural net on billions of rows of data) and inspect

Do you do work where you have to inspect large data arrays? The ability to pause execution (say, training a neural net on billions of rows of data) and inspect what the weights and biases are doing over several iterations is invaluable, and much easier to understand than running->printing/logging. Especially if it takes a significant amount of time to hit that point of the code. If there is a problem, I can work with the processed data, and make changes live, rather than edit code, run it, wait for 30 minutes, and hope it works, since it can take several iterations.