I just sadly doubt that most people outside a very specific bubble would want to have their own node in said network. Even without the need to care for it, think about hosting and so on.
Most people are fine with using "rented real estate" on a centralized platform. It doesn't cost them time, nor money (advertising and data collection as revenue streams). They connect with people (social networks) or use a service (Goodreads) to achieve some form of goal.
Why would say add any friction for themselves? Any complexity above that?
A much as I would love to have these decentralized open networks, I will miss them in the future. Sadly it seems that central platforms have won.