I’ve been waiting so long for this, was deeply disappointed when it was dropped from a release last year and then suddenly…it seems it has shipped with iOS13.4 and Catalina 10.15.4. I don’t know whether it unexpectedly shipped or whether I forgot that it had been set to appear at this time all along.
What can I say, I’m very excited, will it really be goodbye DropBox? I think so, if it all works well.
I just ran a quick test, and copied a link to a folder to share it with myself in Things.
It worked beautifully. This will be wonderful for using Things and Agenda, neither of which supports attachments in the way I want. Things doesn’t support attachments at all, and Agenda creates copies. This solves that problem. 
I’m still waiting for iCloud to share my files between iCloud and my computer… 
This came timely to me as I just upgraded my 200GB to 2TB. Now, I can put files and share to my heart’s content!