A gig and a half is all of core and contrib.
Drupal core with all of its history is 23 megabytes in a git repository.
Sticky write permissions forces new directories
chmod g+ws -r files
I show people the contents of this directory where I have index.php1, index.php2, index.php3, and why this [is a pain].
Before we even get into the benefits of collaboration.
P not moving toward git until Drupal.org moves toward a DVCS
That's why I have the system with a git copy
It will not be trivial.