Tri- props are less efficient than 2 bladers and should be used only when you need more thrust in a limited diameter. In reality a single blade with a counterbalance is the most efficient but very impractical for other reasons.
I, personally, have no interest in a large machine required to lift larger cameras with handles, knobs, buttons and dials that no one can reach in the air. DJI’s brilliance is in designing and manufacturing cameras made specifically made for drone use. The phenomenal X7 weighs just 1.4 pounds with lens and gimbal. Heavy lift to fly handheld cameras is on its way out, IMHO.
