> How hard would it be to "add one"/refactor? To add one? Trivial. To refactor all of WP core to use it? I could probably do it in a week or two of focused wo

> How hard would it be to "add one"/refactor? To add one? Trivial. To refactor all of WP core to use it? I could probably do it in a week or two of focused work. To enable all plugins and wordpress themes to use it? It is, literally, probably a million times more LOC.