Does another such assembly exist today? I don't think it does but want to know if others can point to one.
Did it happen then because the discoveries were "low hanging" enough that they would be found eventually, such that today we've basically exhausted the major discoverable parts of nature given human limitations, like a depleting orebody where what's left are marginally economic residuals? Or was there something in particular about Western societies a century or two ago that produced such brilliance (or even specifically the Habsburgs's HRE where von Neumann was from), which perhaps we can learn from to steer things today?