Tell other plugins about a save: the editor saves through WooCommerce, which already notifies most plugins: woocommerce_update_product and woocommerce_update_product_variation fire on every save, so they are not offered here (ticking them used to run every listener twice, and a site that had them ticked has them ignored). Older extensions that only listen to the classic product screen can be served by enabling the hook they need. save_post, save_post_product and edit_post are skipped for a row when WordPress has already fired them, which it does when the name, description, status, slug or menu order changed. woocommerce_admin_process_product_object and woocommerce_process_product_meta_* run without the edit screen's form data, so enable them only when a plugin asks for them. Each hook adds work per saved row.
Keep history points for (days).
Show a "Bulk edit" button on the Products list.
Delete all data on uninstall: off by default; your catalogue is never touched either way. On a network each site decides for itself, and only that site's data is removed.

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