If businesses are rational agents that seek to maximize profit then yes you would expect agentic AI to eat SaaS. But this is not the world we live in. So much of business could be automated with 1990s technology. A model that predicts societal change should also be able to explain why this time it's different. Historical precedent says we should expect:

- modest incremental gains in productivity

- society will remain mostly the same

- very few people will take advantage of the opportunities unlocked by AI