Expensive products change in a slow way. Cheap clothing permits fashions to change rapidly because new clothes are relatively inexpensive, and clothes are not terribly durable anyway. Fashions in furniture changes slower. Once consumers have something, they don't want to toss it out. They probably don't even look around if they are not in the market.
Names are easy.
Parents are being replaced over time. It's easy to change names and there's no cost. Other forces operate in commercial areas. For example, class diffusion is still open as an empirical question. We have a good understanding of why wealthy people want new clothes after they see everyone else wearing their current choices.