Would you be so kind to share how you manage to get them to save without further interaction? That would really add usability. Maybe I did take the ctrl+s too literally, but being pedantic was not my intention. Merely hinting at this usability issue. So a solution would be very welcome.

(And I am not the one downvoting you, in fact I couldn't even.)

As an aside: I do find these applications very interesting and am considering to make use of Nullboard myself, but also am weighing it against simply using org mode in Emacs and am looking for any advantage it might offer. Of course the ctrl+s issue plays a role there as well.