There are actually quite some projects named in the article that are moving in on Adobe turf:

- Typst (a new typesetting tool, previously covered here https://news.ycombinator.com/item?id=41014941) - PagedJS, a browser polyfill for CSS paged media - and something called "Pushing forward for CSS Print" which is also about creating professional print media with HTML + CSS

And to top it off, there is a project for digital signatures (Signature PDF) to compete with Adobe Sign...

So I would say the score isn't too bad on that dimension.