Just my own two cents, but languages with richer operator and function sets tend to get the reputation for being "harder to maintain". Back in the days when Pascal was just out and cool, I heard arguments about how hard C was to read and maintain. C was a language richer in operators than Pascal and someone going from Pascal to C would have to go through the learning curve of dealing with the larger set of operators.

If you need a simpler example of this in operation, think APL.

When I asked a friend once why they chose Python for a development project, one comment in passing was that they could write Perl that they themselves wouldn't understand 3 months later. What this says to me is that as code grows complex, more effort should be spent in simplification and documentation.