All objects EXCEPT active as wireframe >automatically<? / auto-display active as solid?

Support Basics & Interface
1

Is there a way to make it that only the ACTIVE object is displayed in solid (or, more generally, any specific display type) while other, non-active objects in the scene are displayed in wireframe (or, more generally, any specific display type)?

So, as you switch active objects either in 3dview or Outliner, only the active object is solid?

2

No, afaik that is not possible. But that is an useful idea, maybe other want this function too.
Make a post here https://blender.community/c/rightclickselect/,
so if other users want this too it may be get on the todo list for blender.