AI Didn't Make Coding Harder. It Moved the Bottleneck from Writing to Reviewing

If you're a senior engineer running multiple AI agents and feeling wrecked at the end of every day - you're not slow, and you're not falling behind. The bottleneck moved, and the new bottleneck is expensive than the old one. Writing used to be the expensive part When you wrote code yourself, you built a mental model of the problem as you went. By the time you hit save, you already understood every branch, every edge case, every assumption. Review was basically free - you were reviewing your own thinking. Now the order is flipped. The agent writes. You review.