Jane Wells, user experience lead for WordPress and Automattic employee, in response to The Morality of Forking:
And if Woo just wanted to fork something, they might have been better off forking Shopp — it has a more consistent UI, less complex code, and better reporting. Then again, Jigoshop creates fewer tables and uses custom post types. Hm, but WP e-Commerce also uses CPTs, has way better reporting, and creates fewer tables than Shopp. This is the problem — everyone is doing something better than the others, but no one is hitting all the targets yet.