This is also true for the roofing industry. Traditionally prickle flashings were acceptable as a water tight seal, but simply folding and sealing with silicon doesn't guarantee the best results.
In previous times when only one galv coated product was available on the market simply soldering and using silicon was an acceptable method, but with today's wide range of Zincalume coated products using a flashing and silicon sealant has become the best practice.
It is still common for architects to want the look of prickles but this comes at the expense of possible leakage over the life time of the roof.
With leaky buildings being such a hot issue in the building industry, it is essential that all steps are taken to offer a fully water tight option. As a manufacturer, Dimond are pushing for flashings to take the place of prickles to create the best option for customers.