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Unlike the Riemann Hypothesis or other big problems, It's not like many people are working on this problem all the time for over 100 years. It's more like a few people at any one time are working on it over a 100-year period. I am sure if someone else would have found this solution sooner if more people were working on it.

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This is a really core and famous problem in extremal combinatorics and a lot of people think about this problem and many related ones. I think the biggest impediment is that too many people were looking for the upper bound instead of looking for a lower bound. The construction here is still incredibly novel and requires sophisticated mathematics to prove it is correct.

> I am sure if someone else would have found this solution sooner if more people were working on it.

How many people would you estimate were working on it?

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