v2 faq

Author: yyx990803

src/about/faq.md

@@ -58,7 +58,17 @@ We appreciate your interest! Please check out our [Community Guide](/about/commu
 
 ## What's the difference between Vue 2 and Vue 3?
 
-Please refer to the [dedicated Vue 2 vs. Vue 3 FAQ](./v2-faq).
+Vue 3 is the current, latest major version of Vue. It contains new features that are not present in Vue 2 (most notably Composition API), and also contains breaking changes that makes it incompatible with Vue 2. Despite the differences, the majority of Vue APIs are shared between the two major versions, so most of your Vue 2 knowledge will continue to work in Vue 3.
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+In general, Vue 3 provides smaller bundle sizes, better performance, better scalability, and better TypeScript / IDE support. If you are starting a new project today, Vue 3 is the recommended choice. There are only a few reasons for you to consider Vue 2 as of now:
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+- You need to support IE11. Vue 3 leverages modern JavaScript features and does not support IE11.
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+- You are still waiting for major ecosystem projects like Nuxt or Vuetify to release stable versions for Vue 3. This is reasonable if you do not wish to use beta-stage software. However, do note there are other already stable Vue 3 component libraries such as [Quasar](https://quasar.dev/), [Naive UI](https://www.naiveui.com/) and [Element Plus](https://element-plus.org/).
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+If you intend to migrate an existing Vue 2 app to Vue 3, consult the dedicated [Vue 3 Migration Guide](https://v3-migration.vuejs.org/).
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+Vue 2 will receive a final minor release (2.7) in 2022. This minor release will backport a selected subset of new features from Vue 3. After that, Vue 2 will enter maintenance mode: it will no longer ship new features, but will continue to receive critical bug fixes and security updates for another 18 months.
 
 ## Should I use Options API or Composition API?