- Will be around for 2 releases to allow downstream to adapt (Going into
  legacy apps like Evolution or even modern apps like Software (categories)).
- Adwaita will only be covering devices, mimetypes and a few exceptions
  in fullcolor.
- All action and status context is covered by symbolics
- categories and emblems are relics

This will allow Adwaita to function as the core asset library for gtk (eventually moving there).