TL;DR. Storage used to be so expensive per gigabyte that binaries were arbitrarily categorized into distinct file system partitions. Nobody ever bothered to rev

TL;DR. Storage used to be so expensive per gigabyte that binaries were arbitrarily categorized into distinct file system partitions. Nobody ever bothered to revisit this and merge back to just /bin. Also, why the heck was $HOME/bin never a thing?