I would think there has been some improvement in robotic surgery techniques since the 8 years ago your husband was diagnosed.
I would also think it depends what research you study. Even the researchers results are often skewed in favour of their biased views.
After all the Open surgeons ( and they are becoming fewer as they retire) often have a vested interest in carrying on with Open RPs as they perhaps don't want to embark on the learning curve of robotics at their stage of their career as they are more comfortable doing what they have done for the last 20-30 years.Nothing wrong with that if they are excellent surgeons. I don't expect the young surgeons of the future to take this path though. They might find themselves frozen out of this type of Urology work.
I have witnessed this myself as Radical Prostatectomy has been taken away from my local hospital and centralised in an effort to improve outcomes for men.
I have read that they will be able to do one port surgery soon and they are nearer to incorporating a microscopic facility for the surgeon in with the 3D camera so that they can see and deal with any spread whilst they are in there so reducing
recurrence. Even the best surgeons open or not cannot see microscopic levels of spread so that would be a great thing. Of course if the cancer has spread further afield that would not help a bit.
They are also other companies looking to develop surgery robots to get in on the act as "Intuitive" the company who has the monopoly on the D'avinci is clearly exploiting their customers. Apparently there is a chip in the consumable instruments that only lets them be used 10 times ,( decided by the American FDA and Intuitive) before replacement even although they could actually be used about 30 times!
Other companies are looking to develop tactile feel for the surgeon and instruments that are snake like in that they go anywhere.
No doubt the cost will come down too once there is no monopoly. Whatever we think robotics is here to stay and be improved upon.
All in all I still think one size does not fit all and sometimes Open could be better. It's not black and white. Such a big part of the outcome/ recovery is down to the skill of the surgeon and not the type of surgery.
All surgeons are definitely not the same and we are reliant on them to do a good job to the best of their ability which ever method they use.
I think we have one of those and he is every bit as keen as us to get a good outcome.
Having come through the usual route. i.e Open then Keyhole and now robotic I don't think for one minute he would be doing this if his outcomes were worse.
I think he is a man of honesty and integrity so we are happy with that.
Everyone to their own opinion though.