She absolutely mentions it. It's basically her entire point.
I was waiting and waiting for her to make her point and explain why FTL would not violate causality. Then she hand waves about the comoving frame in two sentences, insinuating that it might be a preferred frame of SR, and that's it.
It's not like this is some huge oversight that she found there. After all, we define the age of the universe to be in the CMBR rest frame, because it will be less in any other frame. So the CMBR rest frame is unique, yes, but it is not fundamental in the framework of SR. See this, for instance: https://www.astro.ubc.ca/people/scott/faq_basic.html
I was waiting and waiting for her to make her point and explain why FTL would not violate causality. Then she hand waves about the comoving frame in two sentences, insinuating that it might be a preferred frame of SR, and that's it.
It's not like this is some huge oversight that she found there. After all, we define the age of the universe to be in the CMBR rest frame, because it will be less in any other frame. So the CMBR rest frame is unique, yes, but it is not fundamental in the framework of SR. See this, for instance: https://www.astro.ubc.ca/people/scott/faq_basic.html