[sesm]

> What exactly does it improve over lets say PHP or Rails

Uses the same code to render on server and in browser, enables moving render logic from browser to server and vice versa without doing a complete rewrite.

[datadrivenangel]

Not very DRY.

[monocasa]

Arguably more.

[te_chris]

Why? lol

[monocasa]

So that the page is already rendered upon the initial contact from the server, decreasing page load latency.

[meiraleal]

That is greatly compensated by the low quality of the generated code. Vercel's landing page for example takes 12 seconds and 1.4mb of files to load just a bunch of text.