> So today, lots of Christian churches are adopting newer translations of the Bible. But the Mormon church is stuck with the KJV forever because Joseph Smith established the tradition that that's how God sounds when he talks to us. We can't just produce a modern translation of the D&C because it's supposedly the primary source!

You could, though! It would probably be comparably controversial to translating the Hebrew Bible into Modern Hebrew:

https://en.wikipedia.org/wiki/Tanakh_Ram