We won’t know until we fight a symmetrical conflict using 5th gen fighters. It reminds me of the early 50’s, when everyone was saying how IR and RH missiles made dogfighting (e.g. Shaw) obsolete… and it kind of didn’t turn out that way.
So I’ll hold my opinion on how obsolete lead and lag turns are until the wonder days of “see an enemy, kill an enemy” are proven for the 5th gen fighters