I'm unable to add any assessment. Looking for an answer, I did try resizing the window and to dig into the HTML code as some users mentioned in various questions/comments. But as I can see, the option to share to SO is simply missing. All older screenshots I've seen show at least three share icons. But in the code there are only two, for LinkedIn and Twitter.
Presumably with Developer Story going out of service by April, 1st, nobody is going to be bothered to change anything. Yet still there is a sliver of hope I can export a shiny resume out of it with all my assessments in a single package.