I've been keeping an eye on peer-to-peer/federated social networks for a while. And though I left Facebook a couple of months ago, none of these can replace it

I've been keeping an eye on peer-to-peer/federated social networks for a while. And though I left Facebook a couple of months ago, none of these can replace it until they do one simple thing: Allow one user to post to another users "feed". This is what Google+ was missing when it came out. This is what Twitter is missing. This is the reason why Facebook is so popular, IMO. I see something on the Internets which I think my wife would like, but I also want her/our friends to see it and I post it on her wall/timeline. I don't want to post it on my feed, that won't help, and I don't want to private message it to her, that also won't help. Any of these social networks add this feature - then I will champion them to the end of the Internet. And perhaps add support for events. But that can be an adjacent but compatible application.