We’re coming close to releasing Version 5.0 of Webmentions for WordPress. This is the culmination of a long process of rewriting(and a few long periods of not) the entire plugin. There are a lot of low level improvements that will set the stage for more in the future. Entirely new parsing code, rewritten display code, new storage. The reason it has been so long is the migration of data to the new storage. There is more for future, but that will occur after this version is released.