Neovim

Hello, I was trying to configure i3 to match the functionality of vim (i3 uses jkl; because h is mapped to horizontal split), but when I was doing it I was wondering what the reason is behind every vim or vim-like editor using hjkl. It's rather inefficient to have to move your index finger to the h key every time you want to move left. I know that the creator of vi had his hjkl keys mapped to arrow keys, but why hasn't this changed. Is it a historical thing, or is there an actual logical reason.