ANYHOW, this is all a whole lot of quibbling to get to a very simple point: fictional physics and fictional science aren't "magic" and shouldn't be referred to as such unless they are self-described as magic. We all know we're talking about Stellaris, and that Stellaris is fictional, so there's no need to say that FTL is "fantasy magic" because within the context of Stellaris it isn't.
And I disagree because that simply doesn't work, and the REVERSE proves it. If I were to bring a smartphone back to the medieval era, it's safe to say it'd be considered magic. You can try to explain how it uses "Safe lightning" and a list of metals they've never heard of, but I can guarantee you they'll think it's magic. Just because all the books they write of it call it magic doesn't MAKE it magic, because it still obeys the laws of our universe!
Actually enough of the semantics, here's Dictionary.com's definition:
"1. the power of apparently influencing the course of events by using mysterious or supernatural forces."
"Mysterious" forces is in fact included in the definition of Magic, meaning magic CAN be something that is "scientific" and not supernatural in another universe but is NOT logical in our own. It's any force that cannot be explained by the laws of physics (or biology), relevant to
our universe. Since anything can be
theoretically non-mysterious to a fictional universe, there's no difference between a universe that calls mechanicX as "magic" and a universe that calls the exact same mechanicX as "Science", except in background theme.
Since traveling faster than the speed of light is impossible in our own universe, any portrayal of such is fantastical as a result. Within Stellaris, it is a science, sure. I'm sure magic in Harry Potter is also a science (within realm of possibility since it's being taught alongside mathematics). Doesn't matter how it's portrayed in that universe for the point of defining it.
Very important in how it's portrayed when discussing thematics, of course. 1984 checks all the boxes of being a Sci-fi, but because of the theme and setting, that's
not what the focus and theme of the book is.