Actually, the "loophole" is an allowable deduction for business EQUIPMENT. Up to $100,000. A bidness may buy any equipment it needs and, rather than depreciating it out, expense it in one year. Equipment includes printing presses, examination tables, compooters, telephone systems, tool-and-die making equipment, lathes, mill saws, laser eye surgery devices....list is endless. Included are motor vehicles.
The Left has simply seized upon that one item of allowable equipment to label the entire law as an SUV law.
Michael