Certainly it can be made to work, I spent years on things like it, etc.

I actually did similar in production at Google, which i suspect is one of the companies you are referring to.

I'm even overall a fan of using JITted code in production for normally "static" languages.

But - i've never seen this sort of thing break through the significant resistance/feeling of taboo that often exists around doing that kind of thing in production, long term.

You will find companies here and there willing, sure. But writ large? It eventually goes away, even at companies willing to try it.

I do hope they get past all that, i just ... am skeptical.