[fkrst]

When you're building a product you definitely want to spend your time fucking around with all the object lifetime concepts of Rust or the subtleties of its compiler...

Just use any language with high-level features like a garbage collector, bignums by default and message passing concurrency (Racket, Erlang, whatever), and you will be more productive, and actually have more "fearless" / safe programming than you will ever have using Rust.