Troubles with VirtualBox and the Windows Subsystem for Linux

Today I learned the hard way: don’t you dare running a vanilla install of VirtualBox together with Windows Subsystem for Linux v2 (WSL2). It won’t work. That’s because WSL2 uses Hyper-V under the hood, which is incompatible with VirtualBox. According to the official documentation for VirtualBox v6.0: Oracle VM VirtualBox can be used on a Windows host where Hyper-V is running. This is an experimental feature. No configuration is required. »