I feel like you are responding to something that's not in the article.

It doesn't say SaaS is being replaced by agents, rather that SaaS companies will be transformed in the way described. Outsourcing will still happen, hence the discussion of headless components, and the continued demand for SaaS.

And part of the argument is that we won't just be waiting for the new breed of LLM-native companies; lots of existing businesses are being LLM-ified right now, through the process described in the article...