But the graph wasn't based upon "what if xyz ban" - it's quite obviously based on the relative rates of growth leading up to the production of said chart.
At the time of production, and including how the US market was developing at the time (continued growth of Juul mainly) then I would view it as a reasonable projection of the global market shares.
Well it did assume a what if xyz - as the "xyz" was the market continued in US as it has been
predictions are still guesses, some may be more calculated guesses than wild guesses
but still guesses and depend on certain factors remaining/continuing etc.....
Even then, that margin shift I doubt myself that it would continue quite like the graph said
I would say after a while, more experienced vapers would migrate to another setup/system
with more flexibility & control as many seem to do
the flip side is more new ex-smokers/vapers arrive with AIO's pods etc.... but often they too may migrate
but the general feeling is that the large explosion in vaping in general is starting to slow slightly
than continue to multiply as rapidly as it has done in recent years - imho
So me personally the graph relied or assumed that closed systems would continue to grow rapidly
and also numbers of vapers continue to grow at a rapid pace too like they have been
(so there is two assumptions, based on xyz growth continuing, which I'm starting to think perhaps not)
I just think numerous predictions should be taken with a pinch/fistful of salt at times
yes many do seem to come true - to an extent, but also many have not come to fruition quite so accurately
I'm just a little sceptical of certain predictions, that's all