Jan, thanks for the reply.
I hope we don't lose the legacy material. Sometimes it's necessary to make 'fake' materials that can't be made with the physical... For example sometimes I want a different IOR for refraction than for reflection. That can't be done with the new physical material.
Totally agree. I really liked Physical Material, especially its physical logic and functioning. This makes it easy to make the right materials. But this is also its disadvantage, because with Physical now it is impossible to create an arbitrary fake "artistic" material. For example, so that the metal turns into plastic.
Using a simple example, I tried to repeat the old Legacy with the help of the new Physical. It didn't work. For a simple material it is easy, but for a more complex one I had to make a composite of 2 Physical, although Legacy alone used to be enough (Layered Material not to offer - I don't like him). And Converter... - it is sad and it is only suitable for the most simple.
So for artists, Legacy is still needed.