the obsidian-git plugin. Auto commits and pulls/push every x minutes. Works great for me, I get full version control and works on all my platforms (Linux, Windows, Android). You just need to be careful with your .gitignore and add at least .obsidian/workspace.json to prevent conflicts.
Probably not suitable if you store larger files, but after a year of daily usage with tons of small images I’m still below 150 MB.
Kind of interesting that these have been a thing in Europe. It’s all just regular taps and the few ones I have seen weren’t very popular.