Does D have too many features?

[SomeDude]

On Sunday, 29 April 2012 at 20:54:11 UTC, Alex Rønne Petersen 
wrote:
>> - unit tests
>> I would rather have them as a library.
>
> D unit tests were never really useful for anything beyond 
> single-library projects IMHO. They don't scale for large, 
> real-world application projects with lots of libraries and 
> executables.
>

What's the problem ?  What prevents you to put the unit tests in 
other modules if you don't want to put them with the code ?