The uncertainty surrounding NWP sent me on a search for alternatives.
I found Storyist.
If you're a novelist, it's great software. The developer is responsive and Storyist is still actively being developed. I've been using Storyist about a month and it's been great. The bonus, for me at least, is it can do screen and stage plays. The ability keep assets with the project—something I thought I'd never need—has proven to be incredibly convenient.
Food for thought for Nisus refugees feeling anxious over the lack of communication from Nisus.