Splitting services and porting them to a faster language doesn't prevent prototyping in the main, slower, language (in this case, Ruby). It also doesn't need t

Splitting services and porting them to a faster language doesn't prevent prototyping in the main, slower, language (in this case, Ruby). It also doesn't need to be microservices madness - see GitLab (and also GitHub, but I think they don't open source their internal services), which rewrote some parts in Go.