Your workflow is unique 👨💻 - tell us how you use Dropbox here.
It would be extremely helpful to have the ability to download a PDF (or image, or other file types) with comments included. Alternatively, could there be a way save out just the comments as it's own ...
I only use Dropbox for transmitting large files because of this limitation. As an editing device it's basically unusable. I had hoped things had changed from 5 years ago when this shortcoming came to my attention but it hasn't.