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Ask HN: Can I get enough UV through a window screen to produce Vitamin D?
I'm basically living my days in one room due to the need to isolate myself. Can I get vitamin D through the screen? Or will this somehow break up the UV rays?
I suppose a big exception to this rule would be when there are major players in a particular niche. For example, it would be more expensive to build a competitor to Google now than in 2000. But it still follows that the code it's cheaper to write now because there are so many more tools available to the coder than before.