Battery life and hardware support. You'd get better battery life and thermals running Linux in Virtualbox on a Windows/Mac laptop than on bare metal. I'm a Linux enthusiast but every time I use it on a laptop is pain. Laptops are like phones in that they need deep integration with the OS to be usable long-term. The best way to use Linux is on a desktop that you build and can control what hardware is used. (The desktop with multiple monitors is a superior form factor IMO for getting work done.)
I wonder why not use Linux at that point tho?