Why are some types from std not in the core of the language?

[forkit]

On Sunday, 12 June 2022 at 17:29:27 UTC, Ola Fosheim Grøstad 
wrote:
> On Sunday, 12 June 2022 at 14:34:23 UTC, zjh wrote:
>> D should stop `'D2'`, develop `'D3'` and radically refactor 
>> `'DMD'` for `'D3'`.
>
> People have to agree on what D3 would be like, meaning: write a 
> spec that they agree on.

No. D3 will be a fork... too many people stuck in their ways at 
the moment :-(