Collective nostalgia makes people prefer domestic products. Nostalgia for events experienced by members of your own group can make you prefer domestic products over foreign ones, concludes the first systematic investigation into the effects of collective nostalgia on consumer decisions. The results could help countries bolster domestic industries without resorting to hard interventions, such as tariffs or international trade re-negotiations. Source 4y.
Nostalgia can be a good way for businesses to hold on to local assets and products but at the same time it has a time limit. It can be easily ruined if there was a continuation to that product that wouldn't perform as well or more.