The only problem is that this makes it a bit of a write only language. When there is an ocean of language features you don't know much about because you never use them, it becomes a barrier to reading someone else's code and find that they use those features extensively.

The worst is hotshot programmers that seem hellbent on using every feature a language offers because they just learned it in school and want to apply what they know, even though half of the time all they're doing is adding complexity for little gain.