As it heads out of the solar system never to return, the deep space probe Voyager 1 is headed for yet another cosmic milestone. In late 2026, it will become the first spacecraft to travel so far that a radio signal from Earth takes 24 hours, or one light day, to reach it.
It’s been over a decade since I learned this, so my memory is fuzzy, but I recall that for at least the first several decades of space exploration propulsion technology was advancing at a fast enough rate that it was a real consideration to wait on a mission for better tech.
If a probe launched now would take five years to reach its destination, but propulsion speeds are on track to double in two years, it would make more sense to wait the two years, use more advanced sensor/communication/etc. tech that developed during that time, then still have the new probe arrive before the first would.
I haven’t paid a lot of attention, but I’m guessing the tech is no longer advancing that quickly, so the thought process may not hold as much water, but it’s rooted in practical thoughts. And couldn’t you say it’s rather defeatist to assume that better tech won’t develop, and optimistic to believe that it may?