I agree with the comments that having public forums controlled by single companies like Facebook and Reddit can be problematic if they start censoring what people are allowed to post.

What I do, and what I encourage family and friends to do, is to have your own blog and post substantial writings on your blog and use social media posts to reference your blog. I still use social media for posting vacation pictures, commenting on other people's posts, and links to interesting stuff to read on the web.

I think this is a good compromise.