Is it safe to remove useState for just initialization?

[rostero1]

Is it safe to replace const [displayId] = React.useState(() => randomId2()); with just const displayId = randomId2(); since there is no compiler lint warning and the compiler seems to handle this correctly. If not, can this be clarified in a doc somewhere if it does not already exist?

function DisplayId2() {
  const [val, inc] = React.useReducer((x) => x + 1, 0);
  const displayId = randomId2();

  return (
    <div>
      User ID 2: {displayId}.
      <button onClick={inc}>force {val}</button>
    </div>
  );
}

Seems stable with

  let t0;
  if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
    t0 = randomId2();
    $[0] = t0;
  } else {
    t0 = $[0];
  }

[rostero1]

Or is this cache like the cache for useMemo where it can be wiped out at any time during the lifetime of the component.

[rostero1]

Still curious about the cache, but did find this work that indicates we should not do this: https://github.com/facebook/react/pull/31960/files