My take: you most likely are not thinking large enough with coding agents. Think much bigger.
Next time you are using a coding agent ask yourself “what is a version of this task that would take years for a team of humans to do?”
For example - instead of saying “Make this kernel faster” Try “Optimize my entire system and come back to me in 7 days”
With recent coding models I have accomplished 50 SWE-year projects in single digit weeks.