Default I18n load path

Why I18n.load_path is by default Dir[Rails.root.join('config', 'locales', '*.{rb,yml}')] instead of Dir[Rails.root.join('config', 'locales', '**', '*.{rb,yml}')]. It will allow making nice translation tree instead of having bunch of files in one directory. This behaviour should be default (or I am only person that still use YAML translation files, and it bother only me).