For me, the writing speed has never been the issue. The issue has been my thinking speed. I do not see how an AI coding assistant helps me think better. Offloading thinking actually makes my thinking process worse and thus slower.
Similar to moving from individual work to coordinating a large codebase: coding agents, human or otherwise, let you think at a higher abstraction level and tackle larger problems by taking care of the small details.
I wonder if a very lightweight RL loop built around the user could work well enough to help the situation. As I understand it, current LLMs generally do not learn at a rate such that one single bad RL example and one (prompted?) better example could result in improvement at anywhere near human speed.