That's the thing about Traveller: it's high tech rather than magic disguised as tech, except where explicitly noted.
Gravity control violates physics, fusion power (may) exceed theoretical maximum energy conversion, and Jump Drives violate relativity. They're necessary for the setting, and have lampshades hung on them*.
For everything else in the game, technology advances rather than being a fait accompli. It's not magic; sophonts developed it over time and the process by which it advanced is clearly laid out. And the products of the intermediate steps are often also in use somewhere!
Oh, right. Psionics. <shrug>
*Lampshade Hanging (or, more informally, "Lampshading") is the writers' trick of dealing with any element of the story that threatens the audience's Willing Suspension of Disbelief, whether a very implausible plot development, or a particularly blatant use of a trope, by calling attention to it and simply moving on. (TV Tropes)
Gravity control violates physics, fusion power (may) exceed theoretical maximum energy conversion, and Jump Drives violate relativity. They're necessary for the setting, and have lampshades hung on them*.
For everything else in the game, technology advances rather than being a fait accompli. It's not magic; sophonts developed it over time and the process by which it advanced is clearly laid out. And the products of the intermediate steps are often also in use somewhere!
Oh, right. Psionics. <shrug>
*Lampshade Hanging (or, more informally, "Lampshading") is the writers' trick of dealing with any element of the story that threatens the audience's Willing Suspension of Disbelief, whether a very implausible plot development, or a particularly blatant use of a trope, by calling attention to it and simply moving on. (TV Tropes)