The original plan was to get Surgibot approved then get Senhance approved. When Surgibot did not get approval they reversed their plan to get approval for Senhance then Surgibot. Wise decision!
The main point I was making was that they had not been working on getting Senhance (Alf-x) approved (for years) since 2015 like you stated. It has been a much shorter time frame than you and others I have heard stating.