1993: I use BBSes for online interaction. Each BBS is run by some random person. They connect to a federated worldwide network. I keep my notes in .TXT files.
2008-2022: I use social networks like Facebook and Twitter for online interaction. They're huge and popular. I use Evernote for my notes, which is full of features.
2023: I use Mastodon for online interaction. Each instance is run by some random person. They connect to a federated worldwide network. I keep my notes in .TXT files.