• command line - Telling Vim to use custom .vimrc is easy, but how to tell it to use alternative path instead of ~/.vim? - Super
  let &runtimepath=/path/to/specific/vim/folder
  in tech > OS with path runtimepath vim
• linux - Utilize a different user's vimrc as well as vim folder - Unix & Linux Stack Exchange
  :set runtimepath=/home/b/.vim,$VIMRUNTIME
  in tech > OS with home runtimepath vim vimruntime

runtimepath from all users