I informed Barn2 customer service that the items I had marked as discontinued persisted in the category item counts. They immediately addressed the problem in the next update. Impressive.
This plugin does exactly as it says, no extra functionalities you don't need. Discontinued products should be a native feature in WooCommerce, this plugin makes it so.
Barn2's support is excellent. When I had a bug relating to the plugin, I got a response on the same day and the bug was fixed a few hours later. Support are easy to deal with and quick to help.