Not all developer tools and languages let you compile to fat binaries. Also I don't think that they were pioneered by Go. Java .jar files have been around long

Not all developer tools and languages let you compile to fat binaries. Also I don't think that they were pioneered by Go. Java .jar files have been around long before Go even existed. Jar files are probably even better in fact because they can run on any operating system without any sort of virtualization. Docker standardizes containerization. Kubernetes relies on a standardized container platform like Docker in order to be able to automate the running of different systems in a consistent and repeatable way. Also, from the point of view of someone who has to provide support for software for multiple customers, it helps to know that the Linux environment between all customers is consistent... That way you don't get strange issues that only happen to one customer and not the others because of some slight OS level differences.