We have about 900 Point Of Sale locations across the US running SQL Server Express on workstations and SSD drives. So, the disks are not invisible. If the event of a fire, flood, or hardware failure, we will run the POS from a cloud VM for a few days or weeks until support has a new workstation(s).
"Do not seek to follow in the footsteps of the wise. Instead, seek what they sought." - Matsuo Basho