Good question, and similar to a past question, i.e., why review 1/87 vehicles, tanks, ships, and aircraft on AutoModeling, Armorama, Aeroscale, and Model Shipwrights - should they only be on the railroad site because they are a HO scale??
The answer to that and to your question about why the Kitmaster review are related. It has to do with audience, interests, and the worldwide presents of KitMaker Network.
First, your question. We are reviewing a Kitmaster kit that is available for people who want to find it and acquire it, be it to build or to collect. Kitmaster trains may not be an significant interest over on this side of The Pond, but they’re big in England and elsewhere - as mentioned in the review introduction - and this is, after all, an international site.
Additionally, old model kits from defunct manufacturers generate a great deal of interest. After all, didn’t you just announce the Mack Truck from Atlantis? Atlantis doesn’t make a single kit of their own - they’re all reissues from Monogram, Revell, Aurora, Hawk, etc. It may be reissued but it’s still an old kit that went out of production decades ago. (Sneak preview - retired longtime Monogram employee Bob Johnson designed the Mack kits and, at my request, has written up a short history of the kit; I hope to receive it and post it soon.) The fact that Atlantis is even in business is an indicator of how popular vintage and classic kits are. Furthermore, if you go back and look on the old side at reviews of Aurora, AHM, Hawk, Life-Like, Renwal and other gone-but-not-forgottens, you’ll see they often have view totals equal to or exceeding some of the latest-greatest models of the time.
Now for the philosophical part. What is the purpose of a model site? What models do we want to see? Should we only focus on the latest greatest items out of the molds? Do not people enjoy seeing older kits built, such as the 50-year-old Tamiya Panzer III recently presented with great acclaim at Armorama? I see reviewing these old kits as not only a tip of the hat to these things that brought so much joy to so many so long ago, and to today’s collectors. I also see it as a sort of a public service for people who know of Kitmaster kits, and have a curiosity about them.
Or, in short, I can offer you a response I formulated at work. ‘You ask “why?” I ask, “why not?”’
Back to reviewing 1/87 on other sites. People have asked why I do so and if it would not be more appropriate to keep them on a model railroad site where people just assume everything is HO and only HO. My answer to that is 1/87 is huge in Europe and we are an international modeling community. If one peruses a Der Mass:Stab by Herpa, it is full of 1/87 cars and trucks tricked out with intricate detailing, including lighting, remote control driving, and steerable front axles. Military subjects in 1/87 are huge, too. Artitec, Roco, Trident, Hauler, Wespe, etc. have hundreds of subjects. Some factory assembled, many not. To paraphrase Henry Kissenger, all HO is 1/87, but all 1/87 is not HO.
In summary, why review an old out of production model? Because our hobby is a big tent where everyone is welcome to have fun, and Kitmaster models are fun. Those who do not think so are free to submit appropriate features and reviews of what they think is fun.