A last missing link for interoperable representation

[James Kass via Unicode]

Julian Bradfield replied,

 >> Sounds like you didn't try it.  VS characters are default ignorable.
 >
 > By software that has a full understanding of Unicode. There is a very
 > large world out there of software that was written before Unicode was
 > dreamed of, let alone popular.

यदि आप किसी रोटरी फोन से कॉल कर रहे हैं, तो कृपया स्टार (*) दबाएं।

What happens with Devanagari text?  Should the user community refrain 
from interchanging data because 1980s era software isn't Unicode aware?