And as we all know, the first 90% of writing an app takes the first 90% of the time, and the last 10% takes the other 90% of the time.

The 90-90 rule may need an update for a POST-LLM world

"The first 90% of the code accounts for the first 9% of the development time. The remaining 10% of the code accounts for the other 9000% of the development time"