as an epistemological solipsist, and afficionado of the dao de ching ("knife of changes" ??) and similar expressions of uncertainty in rationalisation, i figure we can throw a hawai'ian shaka hand sign and call it a day. one of the things in life, is that human beings are real instances of things. abstractions derived from groups of individuals are otoh abstractions and are not existant. i'd hate to treat a human being with terms appropriate for an abstraction.
everyone's had a go. let's get back to the original topic.
back in teh 1980's FASA cooked up a tabletop miniatures game about giant robot fights. they were kind of like fancy tanks that could jump, not fly like cartoons, and you built your squad by selecting components by tonnage and spend a couple of hours rolling dice with your mates.
frames were 20 to 100 tons, and eg. the engine you installed determined how many places the miniature could move each turn. analysing the availability of motors, it turned out the 45 ton frame was the most optimal for a fast engine. you could throw a 7/11 walk/run engine and have the most tons left over for armor, weapons and stuf. maybe pork rinds.
of course the diaspora of manufacturers for drone components inhibits this kind of analysis because you're never going to know how efficient each motor is until you own one, or your really honest mate owns one.
but that's my perspective on this. my application for a drone isn't racing but a motile platform, maybe just a camera, but i can see myself creating other applications, so a frame that has space to attach something (i don't know yet!) even very light is good. eventually i'll build ones with microcontrollers so i can add motors for things that don't involve flight.
and i expect, since i'm not interested in payloads of any significant mass (a few foot of string with a hook on the end, stuff like that) that the most efficient build for motility and flight time is toward the lighter end of the spectrum. in thirty years of various simulations and practices, it is my opinion that a fast, mobile, small platform *always* has superiority against a heavy platform, unless the heavy platform is carrying something that just cannot miss.
(and yes.. i don't have martial applications, but - though i don't keep a lot of tabs on what the rest of the world is up to, i think drone vs. drone destruction would be loads of fun with the right, mellow, people)
this is why i'm looking at eg. 11xx motors. i love the guys who can fabricate stuff out of a drinking straw and a biro, not the $500 component that looks all shiny. you can also see why i'm so interested in putting the smallest motors i can on a larger frame..
so i can tie stuff to it and adapt it.
my POV