It may be better than an arbitrary cutoff, but I will die on the hill that it's still the wrong way to look at a taxonomic system for non-fusors. Using system dynamics to classify parts of a system is all well and good when you're, well, disecting systems, but this was about defining individual bodies.
Using extrinsic contexts rather than intrinsic ones is how you define dolphins as fish.
Spherical due to being in hydrostatic equilibrium is all we need. But that raised tooany questions about the accuracy of system models for system modellers.
Yeah, I got through season 3 and just let it go after that. Like the other seasons, the first half had me, but the endings killed it for me. And the endings just kept. Getting. Worse.