So, I don’t know exactly why this is happening, as I’m no longer involved, but I do have some experience with the collection of npm download counts. This smells WAY MORE like a data collection error, not a sudden unexplained behavior change on the part of the entire world in tandem.
Interestingly, as of a few days there's been an ecosystem-wide collapse in download counts, **all** following the exact same cliff pattern. 👀