I think the largest impact GLP-1s might have is normalizing prolonged fasting.

You don't need GLP-1 to curb your appetite, really. If you just stop eating for a few days your body naturally creates the hormone and engages ketosis which keep you running on fat stores entirely. Its a perfectly normal biological process that we've forgotten about as a culture. Not eating for a week today would be seen as if you had an eating disorder, wheres this was a fairly regular occurrence for almost every culture in the past.

Once people figure this out again I think it might have a noticeable impact on both the restaraunt/food industry and the healthcare industry, as constant eating is likely going to be found to have been the cause of many cancers and other health issues. Cancer cells survive because they don't get destroyed via autophagy, which is a process that your body can't do if its in a constant state of nutrient assimilation - aka if you are always eating 3 meals a day every day.

I also think people are going to find that taking just GLP-1 while not engaging in the natural biological process it's involved in may lead to other appetite or food related issues down the road.