The method I go to almost always is

> Multi-Environment Setup with Shared Modules

But the con of saying versioning is tricky across modules is damn near impossible to reliably manage.. especially because if I'm introducing a new variable to a shared module A) I need to also add this variable in the inputs of each of the environment.

I haven't found a way to manage multiple versions of the modules across environments if all using the same shared modules. Is it even possible?