Yeah, forever is an overstatement since we know there's not sufficient fuel for that. However, my main point was there's not a global speed limit in the sense t

Yeah, forever is an overstatement since we know there's not sufficient fuel for that. However, my main point was there's not a global speed limit in the sense that a traveler would be prevented from accelerating at some point because they were "near the speed of light". That's pretty mind boggling and quite different from "you can never reach the speed of light therefore you could never travel across the Milky Way in a human lifetime". If you could carry sufficient fuel to accelerate at 9.8 m/s for 12 years you could travel across the Milky Way galaxy (112000 light years). You would be 12 years older but 112000 light years away from where you started. That's amazing to me. It's a given that this is impractical.