Currently all shopping carts are stored in a folder named after the shop. This leads to two problems:

1. A users folder cannot be protected with an ACLs. So letting the user access old orders might pose a security risk.
2. JCR is not very good in handling big numbers of sibling nodes. A smart, hierarchical folder structure might be favorable for shops with frequent customers

Ideally the structure should be configurable with a hierarchy strategy class set in the shop configuration.