Here's one example of why extending a language with "more and better" syntax just ends up adding to the developer's cognitive load:

The biggest feature of C# 3 was LINQ technology. With C# 4, it looks like dynamic typing is going to steal the show. But can you use them together?

One of the of core features to LINQ is extension methods. Extension methods allow common functional to be added to interfaces such as IEnumerable. Extension methods are essentially a compiler trick that uses all the locally imported namespaces combined with the variable's static type to determine the appropriate function to call. With dynamic variables, the variables type is not know until runtime. But by that time, information about which namespaces were imported are long gone.

As Patrick Logan commented:

What's interesting is that none of this is interesting in simpler languages.

Like, say, Smalltalk :)

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