title: Coming from Firebase 8.9.1, are there any big differences with the new version of Firebase v9?
body: <p>I'm planning to build a web app in such a short time. I'm planning to just use what I've learned in Firebase 8.9.1. However, I've learned that there was a new version of Firebase. These are the functions that I would most probably be using:</p>
  <ul>
  <li>Database: Firestore</li>
  <li>Will be using Firebase Authentication</li>
  <li>The usual CRUD operations</li>
  <li>Queries and distributed counters for functions similar to inventories</li>
  <li>Firebase Hosting</li>
  </ul>
  <p>Are there any big differences between the two versions? And is it alright if I'll just stay with version 8.9.1?</p>