Commercial arboriculture has moved steadily toward mechanisation, and the machines it has adopted come from forestry: grapple saws, stump grinders, compact excavators, chippers and tree shears. What has not transferred is forestry's definition of a good machine. An arboriculture business is paid for difficult removals completed safely beside buildings, roads and services, and the machine that earns most is frequently not the one that produces most.
The economics are dominated by setup and access rather than by cutting. A typical day may involve one or two jobs, each requiring a float move, a traffic or pedestrian management setup, and a working position negotiated around driveways, services and fences. Against that structure, a machine that saves twenty minutes of cutting but adds an hour of access difficulty is a worse machine.
The other distinguishing feature is who pays. Councils, strata and facility managers, insurers after storms, developers and private clients all buy on different terms, and much of the work is won on the ability to complete it without incident rather than on price per hour. Insurance, arborist qualification and demonstrable method carry weight in this segment that they do not carry in plantation work.