Unsurprising for multiple reasons. Most organizations have other bottlenecks and limiting factors than “how fast can you develop”.

Regardless, if you’re a dev who is now 2x as productive in terms of work completed per day, and quality remains stable, why should this translate to 2x the output? Most people are paid by the hour and not for outcomes.

And yes, I am suggesting that if you complete in 4 hours that which took you 8 hours in 2019, that you should consider calling it a day.