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React is mostly hype.

It is faster to stream an HTML string than to produce virtual DOM nodes that have to be serialized. A DOM diffing solution based on the real DOM provides the best of all worlds, for most use cases. Plus, there are a lot of other extra benefits that go with avoiding the virtual DOM abstraction.
3 supporter.

React is mostly hype.

By writing HTML in JavaScript to the Virtual DOM, JSX/React violates the W3Cs guiding principle (and Tim Berners-Lee's), "Rule of Least Power," which recommends choosing the least powerful [computer] language suitable for a given purpose.
3 supporter.

React is mostly hype.

Once JSX is used to render a tree of nodes on the server, it is then necessary to walk the entire tree to serialize it to HTML for sending to the browser. Building and traversing a tree requires more memory and CPU than just running a program that renders (complex) HTML in a single pass.
1 supporter.