Indeed, Rust has a very well thought-out core which enables variability (read: "complexity") of all kinds. Variability is a fine thing, but it is at odds with onboarding users from one project to another. I wasn't trying to overstate error handling in particular--I mentioned it briefly in a longer list of examples which in-aggregate affect one's ability to onboard to a new project. I also don't mean to convey that going between Rust projects is harder than in other languages on average--I don't think this is the case at all, only moreso than Go in particular.