I think the thing with the Unimog is that where would I even race it. It's like the TopGear Special Events in GT5 where all you used the Kubelwagen and Samba Bus was just for that specific race and that's it. It's a quirky, silly car but it'll just sit in a lot of players' garages whilst they grind in their 'samey' Gr.3 car in WTC 800 or whatever the trendy grinding thing is.
Also the fact that they keep bringing back cars we've seen in previous GT games that are more or less kinda just there instead of bringing in new (as in unique) models for their respective brands is kind of absurd and very uninteresting. Imagine a BMW Z1 instead, or even a new model M5 or whatever. Instead we kinda just get something that I personally think is more of a time period piece of older Gran Turismo games than anything that could be actually relevant. I could be wrong though, feel free to dissect my post piece by piece as is tradition here.
Also I feel like people underestimate how much non eSports people want some new racing cars as well. Part of the marketing
is the high performance after all.