Menu (formerly 'DropdownMenu V2') includes several benefits like support for flyout menus, improved accessibility, and consistent treatment of checkbox/radio groups. It would be good to migrate instances of DropdownMenu to the new component to make use of those benefits, and visually align menus across.

Editor

• Block options menus (appears in block toolbar and List View) Migrate block options menu to DropdownMenu v2 and use flyout menus to re-organise actions #49271
• Block toolbar menus, e.g. text alignment
• Editor modes
• Inserter -> Pattern filter menu
• View menu in top toolbar
• Options menu in top toolbar
• Document actions menu in Inspector
• Toolspanel ellipsis menu
• Ellipsis menu in global styles panel header
• Block transforms
• Navigation menu switcher/tools
• Media replacement (see Site Logo block inspector/toolbar)
• Aspect ratio (in block toolbar when cropping an image)
• Template menu in page details
• Quick Inserter

Admin

• Add pattern menu
• Navigation menu actions (in details panel)
• Template actions (in details panel)
• Template part actions (in details panel)

Many of these menus can be replicated 1:1 with the new component, so hopefully a lot of the work will be straight-forward. Some will however require some design attention. As time allows let's mock these up in Figma here.

Some initial exploration around this took place in #57996.