If you need more than two windows, then What about combining the two approaches, i.e. nesting soft links in vault-like folders like this?:
- OriginalVault
- .Obsidian
- config
- Content
- ViewVault1
- .Obsidian
- config
- soft link to OriginalVault
- ViewVault2
- .Obsidian
- config
- soft link to OriginalVault
...
With folders for attachments and for new files being other than roots of ViewVaults.
Some workflows might be solved also by Sliding Panes (Andy Matushcak Mode) Plugin