An interesting blog post below about someone being "forced off" Facebook (a centralised monolithic platform) and discovering the Fediverse of different social networks, all connected together by the ActivityPub protocol. Nothing even stops you self-hosting your own social network node and managing that yourself for family or friends.
Not only do the decentralised nodes of one social network all interconnect, but so do completely different social network platforms. So Mastodon connects with PixelFed, which connects with Bookwyrm, Friendica, Hubzilla, PeerTube, and more, and so it goes on.
My introduction to the Fediverse