I take serious issue with this sentiment. I am part of this "new generation" and I have to tell you that there are more of us that want this type of food than those who do not. We remember this food and wonder where we can get it. It not the the food of our grandfathers in floridas, it is our food too and we want it back.
It is not that the desire is not longer there, it is the fact that running a full service jewish deli is really tough. It requires passion and knowledge and a willingness to do things right not cheaply like so many other places. Not to mention that a lot of these ingredients dont exist.
Where can you get liver knishes, rolled beef, kishka made the right way? You cant. Where can you find good mushroom barley that does not taste like canned beef broth? Flanken and pickled tongue that tastes like something? Coleslaw, potato salad, macaroni salad and health salad that does not come in 5 gallon drums?
these things are tough to make and take talent and time to prepare. Not many people around anymore that want to take that challenge, however there are plenty of people both young and old that want to eat it.