I know of this one time (last year) a window that was purposely kept shut was opened by a visitor and the notebook was rained upon. completely soaked. Kept in rice for about a month (changing the rice on some schedule), it booted up fine for a while. then died completely after a few weeks.
There really was some ads that get through last month, but UBO fixed that last week. Either you got lucky or you are not in that set - Google do A/B updates before.