I’ve got a set which was a wedding present over 20 years ago. Had 12 of everything as didn’t want to keep running the dishwasher. Bought extras from a Seconds shop so has spares for if any got broken.
Still going strong and only replaced a few bits - butter dish handles fall off, but get stuck back on.
But the point is that many of us saying we like it got it over 20 years ago. Fashions do change. Probably it hasnt kept up and is seen as expensive. Yes, some people want to regularly replace smaller set of crockery and not soend more than £30 when buying in a whim in the supermarket or online. They might want just plates and bowls…not all the serving dishes, etc etc. Things do change.
Denby did so well as so many had it on wedding lists and the. Kept adding to their collection over the coming years. The market has changed.
The core models like Imprerial Blue and the lighter and darker greens (forget the names) will probably still be available as they always have been. Many of the other collections only ran for a few years and n were discontinued anyway. But Denby told you when that was happening when you were registered with them.
But people dont necessarily see their kitchenware of collectible or for the long haul. It’s prob the same with LeCreuset….you can buy cheaper copies and maybe people replace it or change colours? But is more stand alone items where pas Denby was the whole set and that’s where they made their big money, not just on people buying individual mugs they liked.