Although it’ll get appealed to SCOTUS, this is actually a big deal. Ever since I first read about section 215, around 13 or 14 years ago I’ve been going on about it ever since.
In truth, this cartoon isn’t far from the truth, metaphorically. They’re not in the libraries, but they can, and do record your electronic communications (trust me when I say that, because it’s only a revelation to people who have limited news sources)
To really get into the weeds, go to emptywheel