Quora: Why hasn't D started to replace C++?

[Walter Bright]

On 2/9/2018 6:49 AM, Jonathan M Davis wrote:
> The amazing thing is when a programmer tries to argue that having unit tests
> makes your code worse - not that they take too long to write or that they
> don't want to bother with them or any that - that they somehow make the code
> worse.

It's not amazing at all :-)

The reasons people give to not try something new are hardly ever the actual 
reasons. People will make up on the spot reasons that they think you want to 
hear or that sound good. Their actual reasons they keep to themselves because 
they don't sound good.

If you talk with someone enough you'll eventually figure out their actual reasons.