The focus is on a powerful environment, without replacing any core functionality of Vim itself. For example, autocomplete in Vim is baked in and it is great. There is no need to add a package for it!
If you think this config is missing something, have a good search over the built-in tools available in Vim - you may be surprised!
These simple commands will get you vimming in no time:
# Clone this repo
git clone --recurse-submodules --jobs 8 https://github.com/camfowler/vim.git ~/.vim
After a while, those submodules might need updating.
git pull --recurse-submodules --jobs 8
Enjoy!