Which supply chain innovation most dramatically reduced the cost of amateur astronomy telescopes in the 2010s?

The astronomy industry has undergone remarkable transformations in how telescopes, observational equipment, and space technology reach consumers and researchers. From the days of handcrafted lenses to today's sophisticated global supply networks delivering advanced astronomical instruments, the supply chain behind stargazing has evolved dramatically. Test your knowledge about this less-discussed but crucial aspect of astronomy's commercial development!

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Direct-to-consumer distribution models eliminating traditional retail markups
Computer-controlled mirror grinding technology allowing precision manufacturing at scale
Centralization of eyepiece production exclusively in German optical factories
Elimination of aluminum in telescope bodies in favor of carbon fiber exclusively