Reliability
APC 1200, a fully upgraded unit, is available in addition to the basic unit. It is capable of oxy-fuel cutting and plasma combination, both with the torches mounted on a pivoting cylinder head. They can switch between them electronically in under a second and without any need to be done manually. The Plasma is used most of the time to maximize efficiency. It is preprogrammed with the ability to automatically switch over to Oxy Fuel if there is a material thickness that exceeds the Plasma's cut capacity. The laser probing is included in this upgraded unit.
Cost is the main reason. The plasma cutting of steel produces a lot of carcinogenic dust which MUST be collected in a dust extraction filtering system. This, along with the additional cost to fully enclose the machine in order to evacuate dust, raises the price far beyond what the average fabricator will pay for a beam coping system.