We change how we value code: https://jerf.org/iri/post/2026/what_value_code_in_ai_era/
Short-short version, code will still be accruing value in proportion to how much of the real world it has encountered. The bottleneck on building valuable code will be how much real world there is to go around. As is so often the case, what may initially seem to kill SaaS will actually make them stronger as they end up with more exposure to the real world than some random guy's random AI code.