As a counterpoint, I’m a senior engineer at FAANG with 15 professional YOE. I’ve mostly used scripting languages in my career though.
It took me probably more like 1-2 months to really understand how to code in Rust. I do not think a typical team of JS/Python devs would be productive in 3 weeks. I think it would be more like 3 months. Developers with C++ experience seem to pick it up much quicker.
Also, at this point I’m pretty proficient in rust but I’m still far slower than I would be in a scripting language. So I don’t think anyone would ever reach “equally productive” unless they’re comparing themselves to another compiled language.
I like Rust, but it’s challenging, and it’s certainly not a language for rapid development.
It took me probably more like 1-2 months to really understand how to code in Rust. I do not think a typical team of JS/Python devs would be productive in 3 weeks. I think it would be more like 3 months. Developers with C++ experience seem to pick it up much quicker.
Also, at this point I’m pretty proficient in rust but I’m still far slower than I would be in a scripting language. So I don’t think anyone would ever reach “equally productive” unless they’re comparing themselves to another compiled language.
I like Rust, but it’s challenging, and it’s certainly not a language for rapid development.