D's greatest mistakes

[so]

> What I can see now, mistakes are mostly syntactical like switch, auto,  
> const, rebindable, array ops, full slice, arbitrary-code-contracts  
> instead of single bool expression. Choice for round braces for templates  
> leads to slightly unreadable template code: foo!(params params)(yet more  
> params). Omissible parens feel like omissible semicolons :-/
> Implicitly nested classes.
> Versions should be typed variables.
> C baggage is still around.
> Extensive use of unsigned ints.
> Well, I admit, properties are hard to get good.
>
> Zealous backward compatibility with baggage, early desing and legacy  
> code: these issues are no more fixable, I'm afraid.

I agree on switch, version, backwards compatibility and maybe "const" but  
could you at least give a few examples to others or give some links to  
your reasoning?
For example what is wrong with auto?

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