title: What are production use cases for the useRef, useMemo, useCallback hooks?
body: <p>Outside of the <strong>counter</strong> example seen in many YouTube tutorial videos, what are <strong>practical/real-world</strong> use cases for <code>useMemo</code> and <code>useCallback</code>?</p>
  <p>Also, I've only seen an <strong>input focus</strong> example for the <code>useRef</code> hook.</p>
  <p>Please share other use cases you've found for these hooks.</p>