For sure it's going to depend on the person, but I bet a lot of the hacker news crowd here appreciates observability and metrics.

In software we're wiring up stuff with prometheus and making grafana dashboards and changing code and configuration based on what we see happening. CGMs in a way give you insight into one aspect of your body and diet.

I've been trying Lingo, and it's been super-interesting to see in almost realtime how your body reacts to different foods. Sure you read all the time about "watch your carbs..." or "don't eat so much sugar", but it's hard to know how seriously to take that advice.

It's a whole different thing though when you eat one thing for a snack and see a big spike in a graph on your phone, and eat a different thing the next day and see hardly any change at all. It makes it much easier to rationalize your food choices.