Every time I go to insert an FX I have to rummage through a big list of my plugins, often finding I should have looked in the VST2 one instead of the VST3 one.  Could there be a way of having a 'Favourites' or 'Last Used' list to save time?
(I fully expect someone to now direct me to an already existing function...   )

Favourites exist - create your own plug-in layout in the plug-in manager.

If I need the same plugin on a number of tracks, I insert it on the first track. Then I just hold down the control button, and click the plugin on the first track and drag it to the fx bin of the other tracks.