It might not be exactly what you had in mind as 'in production', but it's probably worth noting that Unity uses Mono as a core component, and it seems to be fai

It might not be exactly what you had in mind as 'in production', but it's probably worth noting that Unity uses Mono as a core component, and it seems to be fairly popular on non-Windows platforms. https://github.com/Unity-Technologies https://github.com/Unity-Technologies