I would think 70 is too many, but it depends on what exactly the module does.
I don't think in this case it's relevant what the module does. It depends on how much functionality the program is actually using. If you are pulling in 70 modules to do one little thing, than that could classify as "overkill". OTOH, if you program is using all the functionality of the 70 modules, than it's probably not overkill. (Although with OO programming, it's easy to write a ton of modules to implement one thing, using a long inheritance tree where every subclass does a tiny thing more than its superclass).
Abigail