I receive on average about one notification from DigitalOcean each month that there's a problem with the host for one of my VMs and there may be some downtime w

I receive on average about one notification from DigitalOcean each month that there's a problem with the host for one of my VMs and there may be some downtime while they migrate it to a new host. Usually the downtime is about the same as a reboot, sometimes there's no downtime at all. This works in part because both Xen and KVM hypervisors (and possibly others) support live migrations, so it's altogether false that virtualization does not increase stability. Both DigitalOcean and Linode use KVM behind the scenes. So, at lower cost than rented hardware, customers get staff whose job it is to constantly monitor systems for hardware failures and deal with them proactively in a way that minimizes downtime.