not having too many backups is a good solution,, but there comes a point how many backups do u need to stay in sync and update when u change one of them ? Suddenly, u start realizing only 3 would be good.
I keep backups but i don't over-do it....... as i don't particularly wanna spend most of my time updating backup after backup just because i changed one file.
If it was all automatically backup'ed across drives, then that would be different.