I tried this early on, but it seems there are vault-specific parts that become weird when used outside their original vault.

I'm also not so eager to regulary waste time for hacking tools. Updating the settings in all vaults each time I update some setting or plugin in one vault would be quite a pain.

It’s not perfect but it did take me about 5 minutes to resolve when I created 3 clones of my main vault.

The main issue was changing the relative path references to the templates and and assets directories.