IMHO, modernization tip toes into the same category as translation. From my limited literature experience, the translator is always credited somewhere near the author as it is considered the translator's version.

I can imagine a "Do-Gooder" helpfully going through Huck Finn and modernizing all that messy vernacular but that book ain't Mark Twain's and it ain't something I'd want to read. Some folks may have trouble understanding what is being said but modernizing the text would suck the life right out of the story.

To your point, I think the ultimate prize is both the original and a modern/translated digital version. Anecdotally, I might have developed an appreciation of Shakespeare MUCH earlier in life had I known not just what the characters were saying but combined with how they were saying it.