Back in February 2016, Jimmy Cuadra wrote a post about “The highs and lows of Rust”. He too came to Rust from dynamic web-focused languages and he too “clicked” with it:
Rust has a reputation of having a much higher learning curve [than Go], which of course affects its popularity. I really haven’t been able to understand why, but somehow Rust just clicks with my mental model of programming […]
fn, and the parameter and return types are typed but other than that it’s more or less the same. I think that that familiarity with such a core and highly used part of the language helps a lot.