I agree or I could agree, all other things being equal, such like the power process (figure-eight, loop…). That can also become another (or even the same) mean to define the power/space ratio.
I have a 7 m span kite with two lines of 30 m. I barely have enough room to make eight figures. If I extrapolate with 1 km lines, I get a 233 m kite.
Now if the power figure is a Low radius loop I can then use a larger kite, perhaps 12 m wingspan, then leading to a 400 m kite with 1 km lines.
We thus see that the march towards a maximization of space is still long.
Of course that can be tempered by other considerations.