What is the ~/bin/bash symlink used for?

I'm just sieving through this project to make my own dotfiles, and i can't figure out what the `bash` symlink in `~/bin` is used for.

It's getting added to PATH in `.bash_profile`, but what does that enable? Is there a reason _why_ it needs to be added to the path?

After installing bash v4 with homebrew, it still needs to be added to `/etc/shell` manually, so i'm not sure what value this symlink is adding. Everything seems to work just fine without it??

Really appreciate it!

Start by inspecting the ~/bin/bash symlink and the PATH entry in .bash_profile, then compare their purpose with the bash installation and shell configuration described in the issue. Done would be a concise project explanation of what the symlink enables and whether it is still needed.

Written by the indexing model from the issue text.