Eh, I like Rust and started my career doing embedded C and C++, so I definitely "grok lifetimes" but I'm probably always going to be more productive with Go than Rust (for general app development, anyway) if only because I don't have to think about memory at all with GC (again, general app development, not talking about performance optimizations). Even if I do a bunch of unnecessary cloning + Rc/etc in Rust, I'm not going to move as fast as I would do in Go.