They've used google-drive-ocamlfuse to mount the drive in Linux, which if I recall correctly is direct access, rather than the way it works in Windows

My mistake, they chose a different implementation

I can't imagine a time when anyone would ever make a cloud swap drive. You want the swap to be as fast as possible

Wikijs supports mermaidjs doesn't it? It's a very powerful markup to diagram tool

Video card passthrough can be a real struggle. If you are using Intel/Nvidia it will be easier though