One of the features I use a lot in Workflowy is the Ctrl-; keyboard shortcut to bring up the quick Jump to… search box. This makes it incredibly quick to find a note.
To get to Workflowy quickly, I map a keyboard shortcut in KDE to bring the Workflowy app to the foreground. The wmctrl app is what does the work.
So with Meta-Space, Ctrl-; and a few keystrokes I can quickly get to about any note.