I still think fiber lines are more robust than radio or wires for distance communications. EMP proof from the long distance aspect.
It is the terminal connections of fiber optic lines which are vulnerable to EMP.
In the article they talk about a person who lives in a rural location and Starlink has been a godsend for them, in terms of surviving an EMP attack it would be so devastating does it really matter what survives because it would anarchy of the highest order