> It's just... wow, that's pretty mission critical for what I gather is still a beta-phase tool.
I think this is very '90s thinking. Extreme "if it's not C++, you can't deploy it!" conservatism about programming languages hasn't been true for well over a decade. Paul Graham has written some nice essays about this very phenomenon.
Also, Rust is not "a beta-phase tool".
New languages are much easier to deploy since the PL Renaissance. There are a few holdout industries that still stick with C++ no matter what, such as games, but they'll come around eventually. :)