Today a theme is applied very late (I think when extensions have loaded). The result is that you start the workbench and the editor theme kicks in only a few seconds later (in the worst case).

Now that we think about making themes more powerful and adding workbench colors, I think the delay before applying the theme is more of an issue.

Can we not persist the last known theme data and just apply it optimistically on workbench start and then when extensions are loaded we compare the data to find out if something has changed?