@bugsong@hannah I found The Invisible Man hard to read, which tells you just how quickly phrases change. (On the contrary, I Am Legend was a breeze despite it being written around the same time.)
@cainmark also, you're right, the copy of IM I have was printed more recently. I mistook that date as the copyright. That explains so much, and I'm glad I brought it up so it could be clarified.
They are approximately 50 years apart.
Phrases used to take 10 to 20 years to change.
Now it's 6 months to a year.
"It's totally rad to not be hep to jive gabbing if'n that's negative to y'alls lookout. "