Nostalgia used to be classed as a medical condition. Displaced people (mainly soldiers) were diagnosed in droves with symptoms like insomnia, panic attacks, and lack of appetite. 'Cures' included opium, leeches, and, more sensibly, just sending the sufferer home.
How things change. Nostalgia has reinvented itself as not only a good, cosy feeling but also a fashionable commodity.
