And now a little time to rant about Michelson/Morley and how they peed in the punch-bowl.
Review: To test for the Aether [stationary or otherwise], light beams, mirrors, beam splitters and other stuff where set up to see if light speed was sensitive to the proper motion of the apparatus/planet.
Null result has been seen as proof of no Aether, and became the corner stone to build special relativity.
Heaviside, Lorentz, Maxwell and Einstein created a whole new world of physics all right, but did anyone miss one vital bit about the null result?
Each time a beam of light interacts with each of the mirrors, it leaves that mirror at the speed of light.
Each beam getting split is both passing through glass [and going the right speed while doing it!] and emerging at the proper speed, and being partly reflected.  See the bit about mirrors and speed of light.
And at the detector, photons are interacting with the electrons in matter, but that interaction in limited to the speed of light.
My point in all this repetition?
All the light beams are going the 'right speed', all the mirrors and lenses are staying in the right places [Lorentz contraction still hypothetical!] and have the right lengths, so of course Null Result!
The Null result was the Null result for the simple reason you can't detect non-accelerating motion using ANY know technology! [The moving thing can't measure it's own movement without referencing something external to itself]
Now if you are accelerating, or rotating [which is acceleration around a center] then bits of light get 'left behind' and that type of motion is easy to spot with this kind of thing.
Does the Aether exist?
Yes, but it has no proper or relative speed in terms of matter/energy.
Speed of light is the rate of energy exchange between systems.
If two systems can only exchange energy at specific rates, limits in the interaction between systems become evident.  Light is always going 'the same speed', but maybe that is the 'translation rate'?

This is all highly metaphorical, but I never met a four I didn't like.