I am 75 and struggle with the same decision making. I lost 22 pounds quite easily on 20 grams of total carbs per day and maintained keto for about a year. What helped me stick with it was listening to the speakers on Low Carb Down under on YouTube. We also quit sugar cold turkey and off keto now use mostly monkfruit sugar. We eat almost no ultra processed "food". We eat "real" food but the weight came back. The belly fat came back which indicates inflammation and metabolic issues. Heaven knows what my gut health is like but I eat fermented foods every day. Because of my age and being raised on the crappy SAD diet Americans have been led to believe is healthy I feel ill equipped to maintain a the keto lifestyle that I know to be better for my body. I made a conscious choice to return to foods that give me pleasure and comfort knowing that it will negatively affect me and recognizing that I am near the end of my life. At my age I recognize all of the strong associations of food with emotionally full events of life. I wish that I had learned about what my body really needed when I was a child but that was not my story and I am not going to be angry and sad about that. As my doc said to me when we were discussing my age and various body challenges, "Just Live!"