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@jonthysell jonthysell commented Jul 3, 2025

Description

This PR updates the documentation to reflect the New Architecture default for new applications in 0.80, and also refreshes the documentation on the differences between the architectures for RNW.

Why

We are switching the default for new projects in 0.80. We are also directing more folks to the "New vs. Old Architecture" page both within the docs and from outside.

Resolves #1046

Screenshots

N/A

Microsoft Reviewers: Open in CodeFlow

@jonthysell jonthysell marked this pull request as ready for review July 9, 2025 16:33
@jonthysell jonthysell requested a review from a team as a code owner July 9, 2025 16:33
React Native for Windows also supports the New Architecture for the *Windows* platform. It was first available as an opt-in preview in [react-native-windows@0.76.0](https://devblogs.microsoft.com/react-native/2025-01-29-new-architecture-on-0-76-0-77/) and became the default for *new* app projects in `react-native-windows@0.80.0`. For more information on the differences between the architectures on Windows, see [New vs. Old Architecture Differences](#new-vs-old-architecture-differences).

## From UWP to WinAppSDK
> **Important:** Nearly all future investments to React Native (and React Native for Windows) will be toward the New Architecture, and we highly recommend that all projects migrate as soon as possible. React Native (and therefore React Native for Windows) will eventually deprecate, then delete, support for the Old Architecture.
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Meta just announced they are freezing their Paper implementation (reactwg/react-native-new-architecture#290). Up to you if you want to mention that here.

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I'l' make the changes in a follow-up.

@jonthysell jonthysell merged commit 371c7f8 into microsoft:main Jul 10, 2025
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anupriya13 added a commit to anupriya13/react-native-windows-samples that referenced this pull request Jul 31, 2025
anupriya13 pushed a commit to anupriya13/react-native-windows-samples that referenced this pull request Aug 11, 2025
)

## Description

This PR updates the documentation to reflect the New Architecture
default for new applications in 0.80, and also refreshes the
documentation on the differences between the architectures for RNW.

### Why
We are switching the default for new projects in 0.80. We are also
directing more folks to the "New vs. Old Architecture" page both within
the docs and from outside.

Resolves microsoft#1046

## Screenshots
N/A

###### Microsoft Reviewers: [Open in
CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/microsoft/react-native-windows-samples/pull/1051)
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Create Documentation for "Can I Migrate My Paper App To Fabric?"

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