I’ve been using Obsidian for a long time. I enjoy it and all of its extensions. However setting up the app and syncthing on all of my systems gets irritating.
Any way, after a little looking around, I found Trillium notes. It doesn’t quite have all the extensions, but is easier to setup. Give it a look, see what you think
There are many people enjoying Trillium, but considering the Obsidian sync concern i’d like to point out two more alternatives: SiYuan and Anytype. :)