I don't think to develop in Rust is a good idea. By developing, I mean one is not sure about his program's objectives, feature set, and its logical path yet. Majority of coding is at this phase. Even for firefox, when they are constantly implementing new features, finding better algorithms, building new APIs, it is in a developing phase. But I think Rust is so far the best language for a production phase. By production, I mean one has fixed requirement, clear algorithm and logic, and its activities are essentially translations from the developing language and bug hunting/fixing. Why in our current software culture there are so few projects in production phase? Why our current user base have such an appetite for developing stuff rather than simple/usable products?