torsion bar and ps box upgrade

The steering box deal has been a direct bolt in for 2+ years now. The second gen box started about a year ago and has become cheaper by 100+ dollars. I still don't know why anyone would want a tubular upper arm over my bac/spc arm. Ive proved on the track its rigid, has greaseable delrin bushings and best of all the easiest alignment and widest range of adjustment. Am i missing something?