Advance surgery techniques are different and may or may not reduce the pay return per surgery for a given surgery. That is the patient pays for the hire of the OR that has the equipment, the OR may charge more for the use of advanced equipment for the facility, not the surgeon. The surgeon may be able to do more advanced surgery which then increases the rate they may charge, or they maybe be able to do existing surgery faster, meaning less cost to the patient for their time, and they get paid less per surgery, but can perform more surgeries in one day allowing more income over the day. Everything is more complicated than indicated on here when comparing jobs. The new technologies in medicine either allow new procedures altogether or reduce the time or mess of existing procedures, which could actually reduce the time and cost to the patient. Whether the surgeon gets paid more or less is dependent on the technologies purpose. If the technology made something much easier than the specialists available to do it increases and the cost will reduce, meaning those surgeons will have to reduce rates on it and yes, lose income.
The motivation for surgeons to move to new technology is also as complicated. A surgeon that perfects a procedure on the new tech and gets known for less pain and recovery time will get more work and referrals. Some stick to the old ways and slowly lose clientele and can become critical of the new ways and bitter about it, just like pilots get bitter about not being hired for the newest and shiniest. "Oh don't beleive (x surgeons claims), yeah you recover faster, but his technique has higher rate of breakage and complications, my way takes longer, slower recovery but guaranteed better results" etc etc... or " I have access to the latest scanning robot thing, so everything is painless and fast recovery, parts are made in Germany not china, so your new artificial thingy will last X longer than B".