Will D always have a way to rebind an arbitrary data type?

[Dennis]

On Monday, 27 September 2021 at 14:34:40 UTC, FeepingCreature 
wrote:
> Ping? I feel this is kind of important.

When I try to answer the question, several issues come up.
- I don't understand the concrete problem you're trying to solve. 
I haven't found the need for head mutable yet so I don't know the 
challenges that arise when trying to write such a type.
- I don't understand the code in your Turducken post because it's 
too complex to just read and comprehend for me. I need something 
to look for when analyzing code like that.
- The question is addressed to "the language developers", which 
is a group of people that come and go and submit pull requests to 
official dlang repos. I can't speak on behalf of everyone and 
can't promise an indefinite commitment like that.
- What is "value-immutable T" and "correct lifetime accounting"?