Yeah, back when 2.5 was new i was annoyed that space changed from showing the popup menu in 3D view to showing that action search list but this annoyance quickly went away when i realized how faster it was to find new stuff with it.
Re:The Grove 8 – Growing Trees in Blender
by soulofmischief on Monday October 21, 2019 @10:33PM
(#21319883)
Shift+A makes sense for the new default 3D menu though, it's Shift+A(dd)
Space or Shift-Space or whatever the new 2.8 default shortcut is opens up an action menu with every possible action available to you and a search bar to explore them.
Actually, with this feature Blender surpasses most other creative suites in terms of discoverability. Perhaps what you are really looking for is a tutorial? They have those, too.