I'm trying to understand why. For example this is a pretty good explanation https://news.ycombinator.com/item?id=20694521 https://news.ycombinator.com/item?id=2

I'm trying to understand why. For example this is a pretty good explanation https://news.ycombinator.com/item?id=20694521 https://news.ycombinator.com/item?id=20694521