Average world electricity consumption is about 3 TW or 3000 average sized 1 GW nuclear power plants.

One could build a hundred factories building 200 MW modular reactors, one per day each, meaning the problem is solved in... 150 days.

It is indeed a large scale problem.

One can still look at projects like the 20,000 B-24 Liberator bombers produced in USA during the second world war. That is a staggering achievement. https://www.airplanes-online.com/b24-liberator-production-as...