First generation protovectors reach the end of their artificial 10-year lifespan. Many of them are beloved helpers and companions, and the sad end of much of this companion race provides some positive emotion and warm feelings toward the budding Vector project. Very few protovectors left to carry on the species.
Reference: HSD 1.0 p.13
Date Notes: Assumed from 10-year lifespan of protovectors. Only three protovector generations, each about 10 years.