VirtualBox performs just fine for me and I’m not exactly light on how I use it. I have a development environment with multiple IntelliJ instances running, and Oracle database running in Docker, etc. And the desktop integration is much better than Hyper-V. KVM is not an option if the host is Windows.
With VirtualBox I can run full screen with multiple monitors - aside from the Windows Key being caught by Windows it’s nearly complete immersion to the Linux desktop. I can then switch to “window mode” if I need to do anything from Windows. And even in “windowed mode” I still have multiple monitors (it does one window for each).
Raw performance isn’t everything. The user experience here is much better than what the hypervisors provide.