Pyinstaller predates Docker. It's not about any individual language not being able to do packaging, it's about having a uniform interface for running applicatio

Pyinstaller predates Docker. It's not about any individual language not being able to do packaging, it's about having a uniform interface for running applications in any language/architecture. That's why platforms like K8s don't have to know a thing about Python or anything else and they automatically support any future languages too.