The issue is that eye surgery is complex. The tech manages the complexity but on some level it weakens the lens, Etc.
A eye surgeon friend/relation suggested that the "next" version of the technology is always better.. and in the past once you had had the surgery you were precluded from the newest revision. That may have changed. His advice was not to get the surgery unless you need it medically or understand that you maybe limiting your ability to get the surgery later in your life when you might need it.