How feasible is it to expect a major breakthrough that allows us sci-fi space travel (and related tech)?

After reading hours on here, I stumbled upon alot of answers that rely on some major changes in our understanding of space and time and its tech to allow us control antimatter or some future thrusters.

From this accepted Answer specific, such breakthrough are kind of expected every 100-200 years.
(see also Kardashev scale)

How realistic is this assumption for our (near) future?

Points on why it may not happen:

• such tech-jumps only happened recently and only once/twice (around industrial revolution I guess and our modern computer times)
• the future may be not this rich for a longer peroid of time regarding war/peace and ressources like fuel or rare metals, which would make it harder to focus on such kinds of science or even to develop large-scale tech
• all major parts in physics seem to be solved (what tech could quantum-physics or the god-equation offer in large scale?)

posted over 9 years ago

Buni‭

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