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> Fermentation and pickling was dropped almost universally (in the West).

What are you talking about? What do you think pickles are? Or sauerkraut, for that matter?

They're making a (strong) comeback (although sauerkraut is still seen as "ethnic" in the anglosphere), sure

How often have you made them yourself, how often does your friend at work make them (if ever?)

Pickles are in McDonald's burgers which is probably as mainstream across the globe as you can get.

Remind me how long after canning food became widespread in the USA was McDonalds created?

Was it 50 years? 100?

Or cheese or beer?