But to make money today in a world full of affluent purchasers, manufacturers constantly have to update their products to sell new product. People no longer sadly want things that last and are good at there designed use, but want visually exciting and disposiable items. Its simply what we have become used to I'm afraid.

But to mitigate this, tooling up for new designs is not as expensive as it once was, latest 3D cutting costs have plummetted and its not unusual to cut whole sections out of MDF, join them together and you have a male or female mould suitable for building and testing a new design. To be at the selling end I'm afraid that manufacturers are going to have to get used to constantly doing R & D and pushing out new models.