Have you noticed that a bunch of things that previously worked (and often which worked well!) suddenly, well, don't? Google returns wrong answers. Websites and apps that were previously snappy and easy to use are now slow and clunky. Previously routine processes suddenly failing for no apparent reason. Spell check and text autocomplete seemingly becoming illiterate overnight. It's even noticeable with things like the volume on a national sports broadcast fluctuating wildly mid-broadcast.