I was thinking on how to respond to another toot tonight, and it caused me to think about Linux as a competitive desktop option.
And I think that it will never make it to desktop stardom because of business. FOSS developers spend so much time reinventing the wheel because wheel XYZ doesn't it do it for them, but no time on the tools that regular users need. For example: There are so many window managers that there's a top 20 list (https://www.ubuntupit.com/best-linux-window-managers-a-comprehensive-list-for-linux-users/). Yet there is no decent PDF editor.
@redeagle might just be be, but I found xournal to be relatively usable as a PDF editor. However, I still get your original point, "PDF editor" is only a small aspect of the problem. And the other thing is also that probably 18 out of 20 window managers are seriously under- or unmaintained…
@math_always_to_tyrants @daniel_bohrer @redeagle I have used xournal++ before and like it best for annotations. Unfortunately, its signing feature is just like gluing your signature as image file in, not the cryptographic certificate-based signature that are necessary for signatures that need to be valid from a law perspective.