[defrost]

That matches my recollection- I started in broad STEM at university in the 1980s and as chip sizes were pushed smaller and denser there was always thought given to signal bleed | harmonics from too many lines too close together.

I suspect "observed in fabrication lab | not disclosed" dates back some years before the paper .. once observed there's always a path to exploitation - but why would anyone broadcast that?

By the time it was chit chat on IRC the general feeling was that some TLA has a working exploit. (obviously unpublished).