Why removed displaying available free disk? This functionality is necessary and convenient.
Created attachment 180528 [details] Screenshot
I'm not a Dolphin developer, but I think this is only the consequence of a new option which allows showing a shorter version of the status bar. You can restore the long behavior by going to the Dolphin configuration dialog, and the "Status & Location Bar" in the "Interface" page, then checking the "Full width" button of the "Status bar" entry.
Oh, really. Thank you!