Comment by petilon

One aspect AI is weak in is controlling complexity. If you tell it to implement something it will go ahead and implement it, without considering how much complexity it adds to the system or weighing alternatives. An experienced engineer on the other hand may decide the feature is too minor relative to the complexity it adds, and may decide to not do the feature. Or he may make some clever compromises to get most of the functionality while keeping the codebase simple. AI is weak in this judgement, it doesn't spontaneously exercise architectural restraint. As a result the code may progressively become too complex even for AI manage, and it becomes whack-a-mole where you can't make a change without breaking something.