Quoting Gustavo from a post from about a month ago:

"Although dynamic_cast<CsmaNetDevice*> (PeekPointer (dev)) is a bit more
verbose.  Ideally I think it would make a lot of sense to have a
smart-pointer based dynamic cast variant, something like:

static inline Ptr<T2> DynamicCast<T2> (Ptr<T1> ptr)
{
   return Ptr<T2> (dynamic_cast<T2*> (PeekPointer (ptr)));
}

Unfortunately the idea got no traction, at the time."

I'd like to suggest we consider adding this.