If you know the node will usually be at one path, but someone may need to tweak it in the Godot editor to point somewhere else, setExport = true. This sets the string as the default path, andalsoexportsButtonPathfor tweaking in a scene: ...
As this doesnt add any methods, stacktraces remain the same and easy to debug. The property is the same as if the user had a field filled with getnode in the ready method. I remember when i started in godot and immediatly got confused as to why there was no OnReady annotation like ...