I'm also liking obsidian a lot, especially that the data lives on the filesystem and in markdown so it's not walled in by obsidian. I made my obsidian project folder a git repository and have a script that runs a few times a day to check for changes, if there are any, it creates a backup commit, and pushes the changes to a remote machine.
What initially drew me to obsidian was the graph showing connection between documents, and while most are connected, it's not what made me stay.. What made me stay was the familiar-ish interface (reminds me of vscode, which reminds me of "ultra edit") and the way it does not impose too much structure on me.