It was a poor man's meal, just like brisket was also poor person's meal and that's why is many immigrant Jews ate brisket. Wish I could say the same for today as both are very expensive in my book! But we all have those meals or dishes from our childhood that we avoid I think. For me, it is peas.
You are correct and that is why it became a stable for the Irish immigrants. I agree with you on the price. Isn't it amazing ow food some of us grew up on was looked upon with distain and now some think it is a gourmet meal.