It IS ever-changing. One library among the zillions of local dependencies that you need to build something changes, and you have to go through the dependency hell.
If entire software world valued backwards compatibility and vigilantly guarded it, that wouldnt be a problem. But in the package hell that we are living in today, every other day a package update brings some incompatibility or breaking change for this or that other thing.
It IS ever-changing. One library among the zillions of local dependencies that you need to build something changes, and you have to go through the dependency hell.
If entire software world valued backwards compatibility and vigilantly guarded it, that wouldnt be a problem. But in the package hell that we are living in today, every other day a package update brings some incompatibility or breaking change for this or that other thing.