title: Limitations of using sequential IDs in Cloud Firestore
body: <p>I read in a stackoverflow post that (link <a href="https://stackoverflow.com/a/51026105/4332541">here</a>)</p>
  
  <blockquote>
    <p>By using predictable (e.g. sequential) IDs for documents, you increase the chance you'll hit hotspots in the backend infrastructure. This decreases the scalability of the write operations.</p>
  </blockquote>
  
  <p>I would like if anyone could explain better on the limitations that can occur when using sequential or user provided id.</p>