Why is D unpopular

[Ola Fosheim Grøstad]

On Monday, 13 June 2022 at 17:08:55 UTC, Ali Çehreli wrote:
> Then I thought more about what encapsulation actually means. 
> Then I realized encapsulation has nothing to do with access 
> control.

How did you reach that conclusion?

There are at least two important aspects of encapsulation in 
components: information hiding and access control.

*Information hiding* has to do with preventing the user from 
making assumptions about how something works beyond what is 
documented.

*Access control* has to do with reducing the number of failure 
points that has to be inspected in more complex software.

The latter aspect is quite important in complicated low level 
scenarios, like performance oriented concurrency code, as well as 
complex setting with many moving parts at any level (also at the 
cloud level).

In Python the latter is not so critical as you typically don't 
care too much about performance or concurrency and have many 
opportunities to avoid complexity.

Maybe the typical usage of D falls somewhere between Python and 
C++. Whether something is ok or not depends on the use case…

The key question is: what usage scenario is D trying to be best 
for? Answer that, then we can discuss concrete features. Without 
an answer to that question discussions will either be personal or 
abstract.