I agree that we still don't totally know what happened 2000–2020, but e.g. the Eddington eclipse proof of relativity was 1919 and Einstein became an international celebrity around then.

I think I am underrated some math discoveries since it's not an area I follow, e.g. the Poincaré conjecture proof is probably a big deal. On the other hand, when did Poincaré make his conjecture? 1900. So in a certain sense, we are backfilling a known gap.