Limited type matching?

[Namespace]

> Currently, all of array types does not allow copy-conversion 
> like ushort to short for their elements.
>
> In old D1 age, static array did not have value semantics, so 
> the behavior was expected.
> In D2, static array had changed to value type, but the behavior 
> was not changed.
>
> As far as I know, there was no discussion about that, but at 
> least it is not fundamentally wrong.
>
> Kenji Hara

And what is your personal opinion?
I think an implicit cast between signed / unsigned would be 
acceptable even with static arrays. It were only logical.