I don't even know what the role of a catalogue is anymore.
If you look at Argos, the catalogue is a book full of items they currently sell, when they run out they get restocked. In model railways, a catalogue seems to be a series of promises of something that may appear some time in the future and will be likely a single run or possibly have a second run and then be no more.
At least web pages can show current, past but still in stock, past and out of stock and future release which are much clearer than a one of catalogue.