Which is why as i said a few other times:
a cell system recruiting many people with a high death rate would be more realistic. In real life, the series may have started with Jake and co, but probably ended with a completely different set of people with perhaps one survivor.
for instance in the vietnam, death rates were so high that if went like this: Lee, Tuan and Nguyen (the only vietnamesish names i know i couldn't bring myself to say alice, bob and carol) join the vietcong, Lee dies and is replaced by Hua, Tuan dies and is replaced by Luu, Lee dies and is replaced by Cam, Nguyen dies and is replaced by Bian, Hua dies and is replaced by Thuong, Luu dies and is replaced by Ton, Cam dies and is replaced by Phan, Bian dies and is replaced by Duong... etc etc etc until by the end of it the people who knew Lee (and knew where Lee was buried more importantly) have long since died and the people who knew them have also long since died, so that the final team would have or knowing nothing in common with the originals.
Depressing isn't if you applied this to the animorphs.