Any claim about "productivity is due to X" that doesn't define a timescale is either flawed or misleading. In fact all measures of anything need to be done across some meaningfully defined time scale to have any relevance.
Curious how companies measure developers productivity in the era of vide engineering... Token usage? Lines of code? Features shipped? Bug fixed? Code health? Maybe we should use amount of code read or PRs reviewed? Or another metric that would correlate with the amount of person's accountability?
Does it matter? The ultimate way to measure productivity is $$$.. companies that generate more $$$ with the same number of "people" are more "productive". Drilling that number down to orgs/teams/ICs is a political endeavor, which means how you do that depends on the result you're looking to generate.
Even if the ultimate measure is dollars most employers will attempt to predict which metrics of employment best correllate with dollars so they can predict how many people to hire
Not doing something is much faster than doing it fast. Sit on your ideas, think them trough, dismiss early, or choose to move to implementations.