Why UTF-8/16 character encodings?

[Vladimir Panteleev]

On Monday, 27 May 2013 at 21:24:15 UTC, H. S. Teoh wrote:
> Besides, it's impractical to use compose key sequences to write 
> large amounts of text in some given language; a method of 
> temporarily switching to a different layout is necessary.

I thought the topic was typing the occasional Unicode character 
to use as an operator in D programs?