Facebook uses React extensively and Microsoft has even shifted Office 365 web to React on the front-end as well.
This report presents the combined
results of the fourth annual Developer Ecosystem Survey conducted by
JetBrains. Feedback from 19,696 developers whom we surveyed in the
beginning of 2020 helped us identify the latest trends around tools,
technologies, programming languages, and many other exciting facets of
the development world.
Our new React-based web app is built from more than a hundred components, many of which are themselves created using simpler building block components.