I did not slog through all 11 pages, but figured I'd drop in my 2 cents.
First, I think in this country there is an increased stratification between the well-off and the not-so-well off. I feel like my standard of living is in decline even though I'm in the top 25% of wage earners. All my life I have been able to buy new cars (1992 Mustang LX, 1995 Mustang GT, 2002 Dodge Caravan, 2015 Ram 1500), and now for the first time in my life I feel like I can't afford a reasonable new car.
So for a lot of craftsmen, they are going to have to learn to chase the high-end customer. If you're in the business of selling $2000+ toys you will need to find a way into the clientele who have disposable income for such things.
I agree the younger generation is less and less interested in firearms. They also have less and less disposable income. Many of my friends that shoot in the N-SSA with me got started in the 1950s when they were in their 20's. You'll be hard-pressed to find someone in their 20's today with the disposable income to come to a skirmish. You're looking at $1000+ in equipment to get started. It costs me about $300 to go to a skirmish for a weekend when I sum up gas, camping fees, ammo, food, and entry fees. Now I am shooting 4 guns. You could probably go to a shoot for $100 in total expenses but even this would be a luxury for many young people today.
Young people today are going to college and coming out with $80K+ in debt right out of the gate. I have a 16-year-old and a 14-year-old so college is on the horizon. Our local university costs about $22K per year if your kids live at home. So a college education is going to run you close to $90K. Fortunately, they have both gotten into a high school program where they will earn 2 years of college credit while in high school, for free, so if they go to college here in state hopefully they can get away for only $45K in debt.
Then I learned that there are 2 kinds of student loans. Subsidized and Unsubsidized. Subsidized are for poor people so I probably won't qualify. Subsidized loans you don't have interest and start paying back when you graduate. Unsubsidized loans you start paying interest the day you sign for the loan. We are going to help out as best we can but we can probably only contribute $1000 a month so there are going to be loans.
The best way to get kids shooting is to take them shooting. I have both of my kids on my N-SSA shooting team. My daughter has been on the team for 2 years now and my son just joined. They love going camping and shooting with their dad at N-SSA competitions. And of course my kids have been shooting since they were little outside of that.
People like us collect and shoot the guns that 90% of "shooters" want to fire a few rounds through and hand back to us. Then they can go back to playing with their .22 AR15 with a Chinese red dot on it .
I've heard it countless times, "I don't want to mess with that blackpowder stuff" people just don't have the internal motivation to assemble all the gear, accoutrements, size bullets, work up patch/ball combos , etc.
They want to just buy ammo and blast
Cap and Ball revolvers have more "cool factor" for young people and I know plenty of AR guys who bought one just because "they're cool" but I never hear of them taking them out to shoot. They just have them, they're not BP enthusiasts. Plus it's a $300 impulse buy, not a $6000 custom Pennsylvania flint long rifle
People also buy Maybachs and Bentleys, there's always a market for the super high end stuff for wealthy people. There will always be people looking for $50,000 custom double rifles. I just think fewer and fewer people are looking for high end muzzleloaders . As the era of original muzzleloading gets farther and farther away, the average shooters interest in that stuff fades unless the laws in your country leave you with no choice
Shooting guns like Krags, Trapdoors and Garands is like stepping back to ancient technology at this point, so the motivation to shoot muzzleloaders is less for even people who are into history. Because you can get pre-98 antiques for less than a Pedersoli
We shoot muzzleloaders by choice in the US , in some European countries muzzleloaders are all they have easy access to.
Like you said, the Economy is a factor. We're going into year 2 of Putin threatening us and fears over a war with China. Even wealthy people are putting their money in other places besides Williamsburg Riflesmith long rifles.
The market is fickle, people are being cautious with their money , young people don't care as much about history, they don't care about relatives that fought in the Civil War, or any other war or have any desire to connect with the past through reeanacting. None of this is good for luxury or niche markets like muzzleloading