I will say that in our council, wood badge is way oversold. Not every person who shows up at a training needs to append a “go to wood badge” to the end of their subject.
I do also wonder how wood badge could be considered a life changing course. Getting married, having kids, or joining the peace corps were life changing experiences for me; wood badge was just a pretty good training course.
I didn't attend, but I've seen many videos of this year's event with Arrowmen in regalia.
From my understanding, OA will continue to use regalia, just not for audiences external to OA.