In my experience, I did not notice any difference in the black beans that soaked overnight and those that cooked directly in the Instant Pot from dry. I make sure to discard the water from cooking and rinse the beans, as I think that the cooking liquid often makes the beans harder to digest. Many people swear that you have to soak the beans overnight. Some even add apple cider vinegar to the beans to make them easier to digest. I don’t bother with the vinegar when I soak them overnight, as I have not noticed a difference. I do however find that It’s really important to discard the soaking liquid and take the time to rinse off the beans before cooking, as this is what makes them easier to digest for me. I also like my beans to be a bit softer (as the recipes indicate). I find that the firmer beans are a bit harder to digest, even though they are fully cooked. If you want the easiest to digest, follow the recipes as written.