"Houston, we've had a problem...." probably the greatest understatement of all time?

As to infinity and beyond, the vastness of space is unbelievable, the distances involved are enormous. To get anywhere, the speed of light is too slow! It took days to travel a quarter of a million miles to the moon, so the speed we can travel in space at the moment is far, far too slow. Voyager 1 has been travelling for nearly 50 years and in that time has "only" covered about 1500.6 billion miles.

Where Are Voyager 1 and 2 Now? - NASA Science

Were we able to accelerate to the speed of light, we'd also have to work out how to decelerate and not only that, how to evade destruction by impacting inter-stellar dust/particles etc, it'd sure be a case of "shields up".