A lot of people are responding with other technical considerations that may lead you to consider using an SPA pattern. But, note that the article is about responding to the stakeholder's request that it should 'feel like an app', and his point is that you can make it feel like an app without being an SPA. Non-technical stakeholders rarely bring up deep technical considerations, they almost always talk about what something should feel like. So, I think his argument, while unlikely to work on anybody, is valid.