I think you missed the point. This isnt about just getting clones for the next round. This is about keeping dozens and dozens of strains on hand for whenever you want to run them next. Imagine having say 50 to 60 different strains kept all in the space of a fish tank.
For myself, i have about 8 to 10 strains i would like keep going for whenever i need the particular relief they provide. I dont have the room for that many mothers even if kept bonsai style.