In the "big deal" sense, i'm always curious in what way. Eg is it a source of constant problems? Where not only a rewrite, but specifically a rewrite in Rust, would prevent a lot of issues?
Or is it more of a "What if" thing? Ie there's not many problems currently, but the liability is a huge deal?
to be clear i work in Rust, use it for all my projects, etc - i'm a fanboy, but i also recognize there's a lot of hype. I'm always keeping an eye out for the Rewrite It In Rust (RIIR?) meme vs actual needs.
Which isn't to say that i think people _need_ to have a reason to use Rust, i use it for everything because i (and my team) prefer it - but i think the meme is destructive.. so i'm always looking for it heh.