Let the devnagari script be lost forever. Let everyone in the world convert to one language, one script, one religion, etc. I don't see why one should care?
The purpose of language and script is to facilitate communication. So if everyone uses the same script, thats excellent. Fewer scripts to learn and easier communication.
I don't understand why people fight over choice of religion, scripts, languages, and so on. Just pick one and go with it. Live and let live. Let natural selection take its course and the better language or script win (or the more cost-effective, considering "Path dependence").
