As soon as the fundraise closes and the go-to-market motion starts scaling. The seed site served its purpose: it proved the company existed. A Series A website has a different job: it needs to sell the company to enterprise buyers evaluating it against established competitors, to senior hires doing due diligence, and to partners tracking the company's trajectory. A site built for seed stage actively works against the Series A commercial motion because every first impression carries the wrong signal about who the company is and where it's going.
