Berries are most certainly not seasonal anymore. They should be but we thoroughly engineered the seasonality out of them. They're always on the shelf. Do people's purchase habits follow the natural seasonality of the product anymore? Probably something that can be found in this dataset as well.
> Do people's purchase habits follow the natural seasonality of the product anymore?
Depends on the store I'd wager. We have a store here (Ametller Origen) that sell things they cultivate/make themselves "nearby" (in the same region, and among other things they sell too) and sell in their own retail stores, I'm guessing most of their customers do indeed follow the habits of seasonality as lots of stuff isn't available outside of the seasons.
Depends where you are. I am in Southern England.
Strawberries are available year round - we get them from Morocco and Spain outside the summer. They do taste differently and during the off season are less reliably red all over.
Thus I will buy them only in the Summer.
Prices also change over the year.
Available year round and seasonal isn't an oxymoron. Something can be both. Just look at potatoes, we learned a long time ago how to store them. Doesn't mean there isn't a time in the fall with they're the freshest and cheapest.
They are highly seasonal. We have not "thoroughly engineered the seasonality out of them".
We absolutely buy berries (and tomatoes) when in season. The flavor is much better!
The pricing of berries are certainly seasonal. Bananas are cheap year-round.