Depends on the application. But for general stuff, it's not miserable. The M1 is the fastest ARM chip of its class around. So virtualizing ARM for Windows probably yields you a pretty fast "ARM PC". At that point, running x86 applications might still be faster than running them on, say, an ARM Surface.No, it really is. How many people want to run ARM based Windows? You want windows because you need to run windows applications. That almost certainly at this point means X86 applications. And Windows 10 emulating X86 inside a VM is going to miserable.