There is a Wait Calculation for interstellar travel. It attempts to determine the minimum number of years it should take us to travel somewhere, such that a future mission doesn’t pass the previous one due to advances in propulsion technology. – WTF Fun Facts
Source: https://www.researchgate.net/publication/260275150_Interstellar_Travel_-_The_Wait_Calculation_and_the_Incentive_Trap_of_Progress
