If you've ever eaten freeze dried, canned and dried foods for extended periods of time, you'll know the joy of something crisp and fresh. Leafy greens are spot on what you'd want. Before refrigeration, greenhouses and global shipping, our ancestors were the same way. It's why something like Polk salad (one of the first greens in Spring) or storing chicory roots for their mid-winter chicon (a single crisp leaf that sprouts from a single root) were so enjoyed. Fresh and green used to be celebrated, before it became too normal to worry about.