I agree with the maintenance point but as far as the "switching" point, it's worth noting that even the less-fancy VMs have supported guest-OS applications ins

I agree with the maintenance point but as far as the "switching" point, it's worth noting that even the less-fancy VMs have supported guest-OS applications inside standalone host-OS windows for a long time. This is particularly convenient for the case described in which the guest OS is used for only one or two applications.