Web Assembly seems like it could live up to all the original JVM goals. That is, being the universal byte-code you can run anywhere. But that's still a few years away? 5-10?
I'd wonder what the patent situation is like. Some of the barriers to that happening could very well be legal.
I don't see JVM-software having the same staying power like some of the compiled stuff. Where the JVM does well is big, monolithic server'y stuff, it doesn't "blend in".
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