unittests are really part of the build, not a special run

["Nordlöw" via Digitalmars-d]

On Saturday, 4 April 2015 at 19:00:01 UTC, Andrei Alexandrescu 
wrote:
> On 4/4/15 10:38 AM, "Nordlöw" wrote:
>> Please also think about how such a builtin feature would 
>> promote
>> establishment and usage of D from a robustness and 
>> productivity point of
>> view.
>
> I do think it's a great idea. Sadly I also think how I have 
> negative staff to put to work on it. -- Andrei

What's the reason for that?

- Lack of time?
- Fear of increased complexity that becomes difficult to maintain?
- Difficult to get it exactly right?
- Or is there something fundamentally wrong with the idea itself?