npm does show last 7 days download metrics by version!

https://www.npmjs.com/package/react-router-dom?activeTab=ver...

As it happens, I was curious about the same thing last year and wrote a script you can run in the browser console to add them up, and it does prove something:

  react-router-dom

  v6 5820458 
  v5 3274886 
  v4 275081

  react-router

  v6 5993187
  v5 3366625
  v4 302549
  v3 156121
  v2 25726 
  v1 8448
  v0 2447

Code here:

  versionsHeader = Array.from(document.querySelectorAll("h3")).find(
    (h3) => h3.textContent === "Version History",
  );
  // requires a second .nextElementSibling for react-router
  // because of the deprecated versions checkbox
  versions = versionsHeader ? versionsHeader.nextElementSibling : null;

  nums = Array.from(versions.children)
    .slice(1)
    .map((el) => [
      el.children[0].textContent,
      parseInt(el.children[2].textContent.replace(/,/g, ""), 10),
    ]);

  for (const v of [6, 5, 4]) {
    const sum = nums
      .filter((c) => c[0].startsWith(`${v}.`))
      .map((c) => c[1])
      .reduce((a, b) => a + b, 0);
    console.log(`v${v}`, sum);
  }