The whole idea of muzzle loader seasons was "primitive weapons"
My state introduced the black powder season with patched RB restrictions in the late 60's/early 70's. I built a RB caplock rifle to take advantage of the added season and the ability to use a rifle in the "shotgun" zone of Michigan. Firearm deer season was 15 days long and usually the second week was filled with family obligations around the Thanksgiving holiday. I can't speak for all but most hunters that I know who started hunting the black powder season did so for the added hunting time not some attempt to recreate the past. When restrictions eased (conicals and substitute black powder allowed) we purchased/used tools to take advantage. I was a hunter. I used legal tools to hunt; archery, firearm, and black powder. I still do.
Truth be told I think the state keeps inventing "New" hunting seasons to maximize license sales revenue. All of the above aside: this year I hunted with a flintlock. I still had my scope sighted, plastic stocked, pellet propelled, saboted pistol bullet flinging, "primitive rifle" with me on the trip as back up.
The "whole idea" of muzzle loader season was extended hunting opportunity. Right or wrong we now have special youth seasons, disabled vet season's, and extended any firearm season that go past the first week in January. In spite of all this our hunter recruitment is failing and with it the deer take is falling as well. There are a lot fewer hunters and a lot of us are getting pretty long in the tooth. Auto/deer accidents are rising and farmers are screaming about deer decimating their crops.