Why UTF-8/16 character encodings?

[Hans W. Uhlig]

On Monday, 27 May 2013 at 23:05:46 UTC, Walter Bright wrote:
> On 5/27/2013 3:18 PM, H. S. Teoh wrote:
>> Well, D *does* support non-English identifiers, y'know... for 
>> example:
>>
>> 	void main(string[] args) {
>> 		int число = 1;
>> 		foreach (и; 0..100)
>> 			число += и;
>> 		writeln(число);
>> 	}
>>
>> Of course, whether that's a good practice is a different 
>> story. :)
>
> I've recently come to the opinion that that's a bad idea, and D 
> should not support it.

Why do you think its a bad idea? It makes it such that code can 
be in various languages? Just lack of keyboard support?