Doesn't seem that significant?
Not to say those blog posts say anything much anyway that any "prompt engineer" (someone who uses LLMs frequently) doesn't already know, but maybe it is useful to some at such an early stage of these things.
> The term “loadout” is a gaming term that refers to the specific combination of abilities, weapons, and equipment you select before a level, match, or round.
In the military you don't select your abilities before entering a level.
Does he pretend to give the etymology and ultimately origin of the term, or just where he or other AI-discussions found it? Because if it's the latter, he is entitled to call it a "gaming" term, because that's what it is to him and those in the discussion. He didn't find it in some military manual or learned it at boot camp!
But I would mostly challenge this mistake, if we admit it as such, is "significant" in any way.
The origin of loadout is totally irrelevant to the point he makes and the subject he discusses. It's just a useful term he adopted, it's history is not really relevant.