Source
Lenny's Podcast: Product | Career | Growth — The grief, loneliness, and burnout sweeping through the tech industry right now | Molly Graham (September 27, 2026) ·
at 37:32 ▸
When this applies
when any organization optimizes for a proxy output metric instead of the outcome that metric was meant to represent
The takeaway
Distinguish generating more output (productivity) from generating more value that moves things forward (efficiency), and manage toward the latter.
Why it works
Volume metrics (tokens, lines of code, output count) can rise sharply while the downstream cost of reviewing, fixing, and rewriting that output also rises, so total value delivered can stay flat or fall even as the proxy metric looks great.
One level up
Any metric that's easy to game becomes a poor proxy for the goal it was meant to track.
Where it stops holding
This stops working when output volume and true value genuinely move together, i.e., when the work being measured has little rework or review cost.
Detail
rule: Watch for metrics like 'counting cars in a parking lot, Slack bubbles, or lines of code' as historically bad proxies for real productivity; the same trap applies to token counts under AI.
threshold: One engineering report cited: lines of code requiring rewrite rose roughly 8x even as raw productivity metrics rose, alongside more security incidents.
rationale: Running fast on a treadmill isn't the same as going anywhere; judgment and thinking quality were observed declining even as raw output rose.
In their words
I thought there was this really interesting engineering report that said, you know, engineer, like for engineering, it has genuinely made people more productive. But the amount of lines of code that have had to be rewritten has gone up like 8x.