How long is a generation?
The gender-neutral crowd was in full force in the ‘90s, IIRC. And this follows their path of having women elders and pastors, which has been going on since the ‘70s.
Like I said, it is just now being codified.
Common usage today is 20 years. The time from the birth of a child until that child births the next generation.
But I prefer the old usage which is the biblical usage which is the life span of a man; three score and ten or seventy years.
So, for something to be a tradition it would need to be practiced a minimum of 140 years.