As an aside, I originally thought this was going to generate a new font "style" that matched the text. So for example, "once upon a time" would look like a storybook style font or if you wrote something computer science-related, it would look like a tech manual font. I wonder if that's possible.
"Once upon a time!!!!!!!!!!!!!!!!!!!!!!!!!!!!!SEED42!!!!!??!!!??!"
and 3) actually just allow you to override the suggestions by typing what letters on your own, to be used in future inferences. At that point it'd be a fairly generic auto-complete kind of thing.
As it is, if you go back into a string of !!!!!!!!!! That has been turned into ‘upon a time’, and try to delete the ‘a’, you’ll just be deleting an ! And the string will turn into ‘once upon a tim’.
If you could just keyboard mash to pass entropy to the token sampler, deleting a specific character would alter the generation from that point onwards.