True. I think of it more as a semantic shift. In the old days, processes would actually quit and some other process would resurrect it as necessary, but then someone had the idea of having some processes catch the HUP and do all that itself without actually bothering any other processes.

And the implementation might actually involve an exec of the process' own executable, meaning that it actually does self-terminate, but it leaves a child in its place.

This is put so beautifully!