Yeah, it's a real thing. A lot of it is down to style differences over the years. Back-in-the-day telling was more accepted. Today telling is almost considered a sin. So instead of the author writing "Jack was mad," the author now has to write a long description of Jack being mad. Pounding their fist on something, turning red in the face, describe their heart rate going up, etc. So things get long winded quick. There's also a modern push for more dialog, less narration, and more character depth, which also make things expand. You see the same in comic books. It's called "decompressed storytelling." Instead of telling a pulse-pounding tale in 1-2 issues, everything's at least a graphic novel, so what would be a thin short story is expanded and expanded to fill out 6+ issues. It's kinda weird.