"The Universe cannot move anywhere.""Nothing outside" (nothing distantly outside -- or distantly within -- the 'local', aka nothing distantly outside -- or distantly within -- the 'relative'). Nothing non-local / non-relative there, then. No where outside / within (no such thing as non-local / non-relative). No when outside / within (no such thing as non-local / non-relative). No state of boundarylessness. No frontier state. Gk. Ou topos -- no place: Utopia (Nowhereland)... so, Dystopia.
External -- antonym: Internal (no external, no internal)inertia
Then "inertialess" must mean "not changed by an external force", but there is no "external"
a tendency to do nothing or to remain unchanged.
"the bureaucratic inertia of the various tiers of government
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is ch anged by an external force.
"the power required to overcome friction and the inertia of the moving parts"
OK, one can pick away at the definition a little . . . . . . . . .
Why, Cat, don't you know that gravity is always the good 'dark' force among the forces of physics? The good 'dark' force both [far to the inside] and [far to the outside] of illustrated doughnut rings. The good 'dark' force having by far the farthest reaches: Reaches all the way to infinite, thus, too, all the way from infinite."More integral to it than any other, which is the closed up non-local rim gravity of the whole infinity of finite universes... in outside horizon of each and every local, relative, universe."
Now, where does one start to answer that?
Your views (particularly your absolutes) regarding the Universe are not mine.Inertialess Universe
To me this is an anthropocentric non-starter,
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. (Wiki) My emphasis.
So inertialess (other than SF imagination) should mean without the property of continuing in its existing state of rest or uniform motion in a straight line unless that state is changed by an external force. Since there can be no external state of rest or relative motion, you cannot apply inertia or inertialess to the Universe.
As far as I am concerned, that is EOS.