You may be on to something
You may be on to something there. The VQ37VHR has been around for quite some time. Unlike the the 350Z that had 3 different variants of the VQ35 (VQ35DE, VQ35DE RevUp, and VQ35HR) in it's 7 year production life, the 370Z has had the same engine in it since it's introduction. This opens up a lot of opportunities for the aftermarket. As the 370Z starts to age it will be much easier to find aftermarket and performance parts that you know will fit instead of having to check to see if it is the right part for the right VQ35 variants, thus making it a good starting point for a build. The one thing we will have to wait and see on though is how long it takes for the 370Z to drop in price like the 350Z did in order to make it more accessible to the masses.