It could be that ISRG doesn't want to disrupt their highly profitable razor and blade multiarmed platform model. Either that or surgeons don't see their SP as advantages to using articulated 5 mm tool set through a single trocar. Only ISRG execs know. TRXC will be down to 2.7 mm soon and articulation will be available in EU next year according to CEO.
Titan is still vapor ware for practical purposes unless you count chicken breasts and pigs.
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