I've been using obsidian-livesync for a couple months now. Works great cross-platform since it runs directly out of my Vault and doesn't cost $8/mo. Mine is running on fly.io right now but I may eventually move it to my own machine. https://github.com/vrtmrz/obsidian-livesync/
I can't help feeling like Obsidian really missed the mark on their pricing here for hobbyist & home users. I can't justify paying substantially more than something like iCloud or Google Drive storage when I'm using Obsidian to just sync some text and a few documentation images. Something like $1-2/mo would have been an instant buy for me, but at $8 it was worth my time to investigate other ways of syncing.
Aaaaand yes, this judge was another Trump appointee.