- T278898: The .editOptions styles should not be shipped as part of ResourceLoaderSkinModule
- T278504: Introduce the mediawiki.action.styles module
- T278401: Table styles should be pulled out of legacy into their own feature
- T278374: Move the `mw-datatable` rules out of legacy to mediawiki.pager.tablePager
- T278576: Remove non-critical path interface styles out of legacy feature into more appropriate homes
- T278575: Separate styling of links in ResourceLoaderSkinModule feature legacy feature
- T269877: Split out ResourceLoaderSkinModule content feature into toc and content-thumbnails features
Anything else from T89981? Mirage already doesn't use legacy.