As probably many of you noticed, Ract ditches the SPA.
The new guidelines made waves in the UI community and it might also affect how you think about the demo applications for Daml.
Start a New React Project
If you want to build a new app or a new website fully with React, we recommend picking one of the React-powered frameworks popular in the community. Frameworks provide features that most apps and sites eventually need, including routing, data fetching, and generating HTML.
See the React docs.