[NOT trying to mansplain anything, I just figure someone might find this interesting; Kyle
@V2Pnutrition can correct me/fill in the gaps if i messed that up, its been awhile haha]
You did better justice to the explanation that I would've- "a source of energy used during short-bursts of activity..."., ha!
You're both right. The OP apparently wasn't asking about details, but just looking to learn if folks take it or don't.
I think the other info provided can be great things to consider when other folks stumble on the thread from searching (sorry if it hijacked the thread, OP).
The ATP-PCr system gets "flipped on" for shorts bursts of needed energy. It is limited. The more of an internal store you have (via eating meat, supplementation, etc.), the more "performance" you're going to see during
that type of activity. Low stores (lack of supplementation, non-meat eaters, non-responders, etc.) generally do not have as good performance in
that type of activity.
With very little of that being done on a hunt (small burst of energy like you might need in a Metcon, sprint, or set of clean and jerks), there's not a big reason to think you "need" it.
But, as you've seen throughout this post, people have mixed opinions/observations/experiences with that. So, even if the "data" says otherwise, you should pack a pile of the stuff if you think it makes a difference for you.