The actual solution is to go for a walk in the woods with some friends or family members.

The actual solution is to invite your neighbor over for dinner.

The actual solution is to volunteer at a retirement home.

The actual solution is to join an amateur sports league.

The actual solution is to take an in-person group class in a subject that you find interesting.

In other words, confine computer use to research and communication in sci-tech alone?

Not bad. It's probably how things should have been, but that boat has sailed long, long back.

Point is, efforts to make decentralisation and independent content creating, hosting and sharing should go on simultaneously with other social steps that you have enumerated. Neither can replace the other.

How does any of that replaces facebook in just about any aspect?

That sentiment is why 99.9999 of programmers like us never made facebook. Normal humans don't want to maintain seperate feeds and RSS readers for every possible interest etc along with a seperate message client along with a place to post photos, etc. They want something simple and human, like fb.

Humans are lazy by design. That's why most laws inconvenience on individual level for the sake of greater good. Getting rid of FB may soon reach that level.

I've also done the same. Invested the last 2 weeks more time in my theoldreader account and using twitter bridges (even instagram bridges exist) for not supporting entities like http://twitrss.me/

Newsletters and RSS feeds don't let me share pictures of my kids with distant relatives. For a lot of us that's the primary Facebook use case.