alt Hacker NewsYou forgot case #4: Worked at a startup where the frontend team thought it was a good idea to use lock files during development, but to do a "fresh" install of all dependecies during the deployment step.
And yes, they still thought they were doing the right thing.
To be fair npm makes (made?) it weirdly hard to use lock files so a lot of people did that by mistake. And when you do use lock, it reinstalls every time so a retagged package can just silently update.