Tl;Dr: Please don't migrate wordpress questions to Web Applications.
It looks that this proposal will not get enough traction. That is fine.
Few days I posted this question, after digging in old discussions from Meta Web Applications about the site scope and tags of othe topics similar to "Wordpress" and thinking about the low participation in answering and curating posts in Web Applications, while this situation continues, as moderator of Web Applications kindly request to not migrate to this site questions that have worpress and don't include any other tag related to well known web applications (Gmail, Facebook, etc.), with the exception of web search engines and analytics as usually those questions are related to specialized tasks that are out of site scope.
The above becuse [wordpress] in Web Appliations is a tag from the early days of this site, before the existence of WordPress Developers. This tag is used for questions about Worpress, (WP or wordpress.org), the content managment software) which are off-topic. For questions about worpress.com, the website hosting service Web Applications have [wordpress.com]. While it might be look that retagging is a simple task, IMO it's better that users interested in asking a question about wordpress.com follow the guidance from the Ask Question form and the other customizable elements from Web Applications, rather than just arrive to the site through the migration path as that will not show the guidance about the workings of Web Applications.
NOTE: Not all the questions about worpress.com are on-topic in Web Applications. I.E. paid account are able to do customizations that might fall out of the site scope. Also some questions related to SEO among other topics might be off-topic too.
To help users to learn about the workings of Web Applications, few days ago the homepage of Web Applications Help Center was updated, currently there is a feature-request in Meta Web Applications to add a tag warning to [wordpress]. More changes are comming.