I suppose most of what would happen has already happened. I've seen the loss of some very high quality blends with the replacement of lower quality versions and the consolidation of brands from separate makers with their own personality operating in many countries to a few makers pumping out largely pale imitations in a few countries. There's certainly been a lowering of quality.
And, that's not new. When Dunhill transferred its blends to Murray's, several of the more complex formulas were simplified. That's 40 years ago. But I do think the process has accelerated and is maybe more widespread.
For newer smokers, that really doesn't matter. They're will imprint on what's available to them today, and appreciate today's blends. You can see this happening in the way that C&D is regarded here. Go back 5 or more years and the brand was largely an object of ridicule in forums. Now it's beloved by many. To some degree that's due to them upping their game and producing some very interesting small batch products. And the change in apprehension has transformed many of yesterday's loser blends into today's winner blends.
Loss of Federal farm subsidies has cut into both the amount and quality of tobacco being harvested.
Most smokers don't really notice. It seems to be a pretty small percentage who can really taste the flavors and subtle nuances in the blends, so the changes just don't register with the majority of consumers. So maybe the changes don't really matter, except to a minority who can taste the difference?
Like many, I put away tobacco as a hedge against what we could see coming and am content. Unlike some, I haven't set aside a half a millennia of stock. I don't see any circumstance for doing that, as I'm not planning to sell it off at 1000% mark up and I'm not sure that I would be able to, even if I wanted to, in the not too distant future. Nor do I consider it, even with the longevity gene on both sides of my family, likely that I'll be around that much longer. I also doubt that my taste for tobacco will be as strong in another 10 years, much less 30 or more. So by best guestimate, I'm good for 10 to 15 years, maybe more if I cut back.
The downside to this is that many blends do not benefit from significant aging, and at some point all I'll have is aged stuff. Also, a certain percentage goes tits up due to packaging failure, or manufacturing errors. Aging is a bit overrated.
The good side is that I still have access to discontinued blends that I stored away, so some of the losses and decline in quality I can avoid experiencing for the time being.
As for whether the so called tobaccapolypse would affect me, to the extent that it will, barring unforeseen disaster, it already has.
I don't see an outright ban or prohibition on tobacco. It's not necessary. Death by a thousand cuts is so very much more effective. I could be wrong about this, given the low IQ of political ideology across the spectrum, but I hope not.