I've got a couple smokeless savages that I use, for absolutely no reason other than to take advantage of the special season. It wasn't always that way, but I get all the black-powder fixes I need with BPCR and cap and ball revolvers now.
Although I have enjoyed the special season for decades for the typically nicer weather and less pressure, I don't feel like there is a lot of logical reason for their existence at all. Just a personal opinion; but I think the hunting season should be the season, and use whatever you want. Bow, muzzleloader, shotgun, cross-bow, rifle, pick your poison and go.