Ah yes, a classic tale...
"We're going to take this perfectly efficient and functional COBOL code base and rewrite it in Java! And we'll do it in a few months!"
So many more competent people and organizations than them have already tried this and spectacularly crashed and burned. There are literal case studies on these types of failed endeavors.
I bet they'll do it in Waterfall too.
It's interesting. If they use Grok, this could well be the deathknell for vibe programming (at least for now). It's just fucking tragic that their hubris will cause grief and pain to so many Americans - and cost the lives of more than a few.
Edit: Fixed some typos.