In some interview the writers said during that period they wouldn't put out an episode until every joke and scene was squeezed for every last drop of laughter, and that meant each joke had to have multiple levels. The best example is this, in terms of how many beats it has:
You've got:
- The bike getting cleaned when you think it will be destroyed
- It falls apart anyway
- The evil driver intended it the whole time!
- The driver gets his comeuppance
All in like 15 seconds
One of Supereyepatchwolf's many fantastic videos is a a deep dive into the decline of The Simpsons and he references that specific joke to illustrate the show at it's high point.