Google's feedback seems to suggest Rust actually might be a silver bullet, in the specific sense meant in the "No Silver Bullet" essay.

That essay doesn't say that silver bullets are a panacea or cure all, instead they're a decimal order of magnitude improvement. The essay gives the example of Structured Programming, an idea which feels so obvious to us today that it's unspoken, but it's really true that once upon a time people wrote unstructured programs (today the only "language" where you even could do this is assembly and nobody does it) where you just jump arbitrarily to unrelated code and resume execution. The result is fucking chaos and languages where you never do that delivered a huge improvement even before I wrote my first line of code in the 1980s.

Google did find that sort of effect in Rust over C++.