In reply to Matt.

It's actually the opposite of that - selectWoo won't conflict with select2. In the past, when WC updated select2 to get a new feature/fix it would end up breaking other plugins that didn't update select2. This fork helps prevent that from happening. It's mentioned in this article: https://woocommerce.wordpress.com/2017/08/08/selectwoo-an-accessible-replacement-for-select2/