I'm just so bummed that multiple vaults are pretty much unusable. I can't sync my sensitive work notes. But I want to sync general programming notes between work and other PCs. But multiple vaults hardly work. The just open in a new window.

Other than that, I love so many things about the program. Just linking and graphs are weird and strangely overrated. Search and tags still rules over everything imo

What do you mean by "multiple vaults hardly work"?

If it helps Obsidian has a newish command called "Change vault..." that switches vaults without opening a new window.

I think separate vaults being in different window is probably intentional behavior to clearly show that they're separate vaults, not something that needs to be fixed.

If you want to sync only some of the things from a single vault and not other things, can't you just use different top-level folders? Have a "to-sync" folder and a "do-not-sync" folder, and only sync the to-sync one. I'm not sure if that's possible using Obsidian's paid sync, but it should be possible with other sync options.

The main problem I have with using different Vaults at the same time is that they all share the same taskbar icon. For syncing you can sync your files however you want.

I mostly use one Vault for my setup, then things like linking and search work the best: https://bryanhogan.com/blog/obsidian-vault

I wouldn't call it unsuable though? I have one separate vault for just journaling and that works well.

Relay plugin lets you manage permissions at a granular folder level instead of all-or-nothing vault level.

The Raycast Obsidian plugin makes vaults pretty easy for me. Cmd+Space > "Open Vault" and then pick which one you want. You'll still have a window per vault but it makes it really fast to get to where you want.