Why Legacy-PC matters

XP/QNX/DOS systems cannot be upgraded as the drivers for hardware are not compatible with later operating systems.
PCI/ISA cards may be configured in a specific way that a new replacement card cannot.
Replacing the PC could save £20k–£250k in machine replacement, if the machine is still perfectly serviceable.
Using a second hand PC may temporarily fix the machine, but refurbishing with a brand new PC will extend the working life of a machine significantly.
Motherboard comes with stable XP and Win7 drivers.