Unless somebody else wants to do it then I suspect you are out of luck. It doesn't seem like this feature request has gained a lot of support to warrant development so far.
@ShobanChiddarth : thank you for taking time to think about the implications and answer with ideas for a solution.
So you want an instant save of the note after a change, no sync, no version history. This is comparable to the feature other apps have where they save when you switch to another app (on android) or minimize the window or regularily. This sounds like an implementable feature request.
Now it needs to gain demand by the community to get higher priorization compared against all other open tickets. The first reaction here in the thread was that only a small minority of users need this.