Why are grape preserves so hard to find in the USA? When I was much younger my grandmother was always complaining that she could never find grape preserves anymore. That was maybe 20-30 years ago.

I recently started looking for grape preserves and am unable to find them. I can find black currant preserves, blueberry preserves and just about any other fruit under the sun. But why is grape preserves so hard to find?

I thought maybe it has something to do with fermentation and wine? But I cannot find any information. I am not talking about grape jelly, I am specifically talking about grape preserves.

Other than making them myself, where do you find any in a store?

** If you do not know the difference between jelly and preserve, you can read about it here.


  
  In jelly, the fruit comes in the form of fruit juice. Jelly has the
  smoothest consistency and is usually clear. 
  In jam, the fruit comes in
  the form of fruit pulp or crushed fruit. This makes jam less stiff
  than jelly. 
  In preserves, the fruit comes in the form of chunks in a
  gel or syrup. Preserves will have more fruit in them than jam will.
  Marmalade is a type of preserve with citrus fruits in it.
TL;DR: likely because demand was too low to sustain commercial distribution

Barring any relationship to a specific historical incident, it's very difficult to find out why a specific food is no longer commercially produced. In the absence of specific reasons, we can see a number of contributing factors as to why grape preserves would have gone off the market:


In the US, sales of preserves in general trail sales of jams and jellies considerably.  Grape jelly eclipses sales of grapes in other forms (sorry all refs behind paywalls).  This distribution is very skewed with 9 varieties constituting 80% of the market.  So it could be quite possible for grape preserves to "fall off" the bottom of the market.
For historical reasons having to do with the Concord Grape, Americans are used to eating their grapes as jelly, so preserves may seem quite oddball and hard to sell.
From what I could gather from the one grape preserve recipe I found, the runny texture of grape preserves are possibly off-putting to most consumers.


Not terribly satisfying, I know, but that may be as much information as is out there.