Time and Money
Back in the day we seemed to have far more time than money. Made wine and beer in large quantities.
Then came children which did away with much of the spare time.
These days we can afford to buy enough wine and beer so the long term effort and disruption required to produce buckets of alcoholic beverage don't seem worth it anymore.
I thought home brewing had more or less died out with cheap supermarket booze so it is good to see it still going. I just need to find someone who wants to buy a job lot of old brewing kit.