Adding a new design constraint to D

[zjh]

On Sunday, 19 June 2022 at 06:22:57 UTC, forkit wrote:

> "Software entities (classes, modules, functions, etc.) Should 
> be open for extension, but closed for modification."


This is the problem of D. when it is very obvious ,then they must 
oppose it.
Finally, they say that they are experts which should break the 
(rules or)consistency!
We are the `first`!
Therefore, D's community is small .