Haven't seen that in years. The newer powders are probably some of it but I also think afordable portable chronographs have had more to do with it. People discovered all that fuss wasn't producing what they thought it was. I do know one guy that still uses Elmer Keiths duplex system but he is down to only one caliber loaded that way. Chrono's ruined that for him, plus he has decided it's a heck of a lot of work modifing cases. Do know a couple of guys that still run a litle smokeless in their black powder loads for cleaner burning, but even that is fadeing away. Can't help but think that overall it's a good thing.
