Updating D beyond Unicode 2.0

[Dennis]

On Monday, 24 September 2018 at 10:36:50 UTC, Jonathan M Davis 
wrote:
> Given that the typical keyboard has none of those characters, 
> maintaining code that used any of them would be a royal pain.

Note that I'm not trying to argue either way, it's just that I 
used to think of Walter's stance on D and Unicode as:
"D would fully embrace Unicode if only editors/debuggers etc. 
would embrace it too"

But now I read:

> D supports Unicode in identifiers because C and C++ do, and we 
> want to be able to interoperate with them."

So I wonder what changed. I guess it's mostly answered in the 
first reply:

> When I originally started with D, I thought non-ASCII 
> identifiers with Unicode was a good idea. I've since slowly 
> become less and less enthusiastic about it.