No need for status drop down
Register statuses for orders
Get status and is_status helpers which compare against post_status
Kill shop_order_status taxonomy
Strings is no longer needed
Failed status
pending
no longer need to install shop order status terms
No longer need system status report on status
wc_get_order_statuses function
Optimise order functions for post statuses
Optimize user functions
Update checkout functions
Optimise cart class
Optimise dashboard queries
Optimise report query
Optimise customer list
get_status_name + my_orders
Update API functions
Implement is_status functions and update_status